How To Remove Cmos: A Comprehensive Guide

In the realm of electronics, the Complementary Metal-Oxide-Semiconductor (CMOS) plays a pivotal role. This tiny, yet indispensable chip is the brains behind countless devices, from computers and smartphones to digital cameras and medical equipment. However, when troubleshooting or upgrading these devices, it may become necessary to remove the CMOS. This can be a daunting task, but with the right approach and some careful execution, it can be accomplished safely and effectively. Here’s a comprehensive guide on how to remove a CMOS, ensuring a seamless and successful procedure.

Before embarking on the removal process, it’s essential to familiarize yourself with the CMOS chip. Typically located on the motherboard, the CMOS is a small, square-shaped chip with two rows of pins. It stores critical information related to the system configuration, such as the date and time, hardware settings, and BIOS options. Removing the CMOS can reset these settings to their default values, which can be useful for troubleshooting hardware issues or upgrading the system.

To remove the CMOS, gather the necessary tools, including a small Phillips head screwdriver, a pair of anti-static tweezers, and a non-conductive surface to work on. Power down the device completely and unplug it from any power sources. Ground yourself by touching a metal object or using an anti-static wrist strap to prevent electrostatic discharge, which can damage the CMOS or other components. Carefully open the device’s case and locate the motherboard. Use the screwdriver to remove the screws securing the CMOS battery, typically a small, round battery located near the CMOS chip. Once the battery is removed, use the tweezers to gently lift the CMOS chip straight up, taking care not to bend or damage the pins. Place the CMOS chip in a safe and static-free location until ready to reinstall it.

Removing CMOS with a Screwdriver

Step 1: Power down your computer.

This is the most important step, as you don’t want to risk damaging any of your computer’s components by working on it while it’s powered on. To power down your computer, simply turn it off and unplug it from the power outlet.

Step 2: Open your computer case.

Most computer cases are held together by screws, so you’ll need to remove these screws in order to open the case. Once the screws are removed, you should be able to lift the case off of the computer’s chassis.

Step 3: Locate the CMOS battery.

The CMOS battery is a small, round battery that is usually located on the motherboard. It is typically held in place by a metal clip or bracket. Once you’ve located the CMOS battery, you can remove it by gently prying it out of its socket.

Step 4: Wait 30 seconds.

Once you’ve removed the CMOS battery, you need to wait 30 seconds before you continue. This will give the CMOS time to discharge, which will erase all of the stored settings.

Step 5: Replace the CMOS battery.

Once you’ve waited 30 seconds, you can replace the CMOS battery. Simply insert the new battery into the socket and secure it with the metal clip or bracket.

Step 6: Close your computer case.

Once you’ve replaced the CMOS battery, you can close your computer case. Simply align the case with the chassis and press down on the screws until they are tight.

Step 7: Power on your computer.

Once you’ve closed your computer case, you can power on your computer. The computer will now boot up with the default BIOS settings. You can now reconfigure the BIOS settings to your liking.

Accessing CMOS Through the BIOS

The BIOS (Basic Input/Output System) is a firmware program that is stored on a chip on the motherboard. It is responsible for initializing the hardware on the computer and loading the operating system. The BIOS also contains the CMOS (Complementary Metal-Oxide-Semiconductor) settings, which store information about the computer’s hardware configuration. These settings are used by the BIOS to configure the hardware and by the operating system to access the hardware.

To access the CMOS settings through the BIOS, you need to reboot the computer and enter the BIOS setup menu. The key to enter the BIOS setup menu is usually displayed on the screen during the boot process. Common keys to enter the BIOS setup menu include Del, F2, F10, and F12.

Steps to Access CMOS Through the BIOS

Restart your computer.
Press the key to enter the BIOS setup menu.
Use the arrow keys to navigate to the CMOS settings menu.
The CMOS settings menu is typically located in a section of the BIOS setup menu called “BIOS Setup,” “CMOS Setup,” or “Advanced BIOS Features.” The exact location of the CMOS settings menu may vary depending on the BIOS version and the computer manufacturer.
Use the arrow keys to navigate through the CMOS settings menu and make the desired changes.
Press the F10 key to save the changes and exit the BIOS setup menu.
The computer will now reboot with the new CMOS settings.

Additional Notes

* The CMOS settings menu may be password-protected. If you do not know the password, you will not be able to access the CMOS settings menu.
* Changing the CMOS settings can affect the stability and performance of your computer. It is important to only make changes to the CMOS settings if you know what you are doing.
* If you make a mistake while changing the CMOS settings, you can reset the settings to their default values by removing the CMOS battery from the motherboard. The CMOS battery is a small, round battery that is usually located on the motherboard near the CMOS chip.

CMOS Setting	Description
Date and Time	Sets the current date and time.
Hard Disk Drive	Specifies the hard disk drive that the computer will boot from.
Floppy Disk Drive	Specifies the floppy disk drive that the computer will use.
Memory	Specifies the amount of memory that is installed on the computer.
Processor	Specifies the type of processor that is installed on the computer.

Employing a Jumper to Reset CMOS

While the preceding methods are widely applicable and effective, utilizing a jumper to reset the CMOS may prove to be the most straightforward approach. This method requires minimal technical expertise and can be executed with a few simple steps:

1. Access the Motherboard

To initiate the process, it is necessary to access the system’s motherboard. This may involve unplugging the computer, removing the chassis, and locating the motherboard within the system. The motherboard is typically a large, green circuit board that houses the computer’s central processing unit (CPU), memory modules, and other essential components.

2. Locate the CMOS Jumper

Once the motherboard is accessible, the next step is to identify the CMOS jumper. This jumper is typically a small, two-pin header that is labeled “CMOS” or “CLR_CMOS.” It may be located near the battery or in a dedicated area of the motherboard.

3. Remove the Jumper

To reset the CMOS using a jumper, carefully remove the jumper from its header. It is important to note that some jumpers have a specific orientation, so it is crucial to observe how it was originally placed. Once the jumper is removed, wait a few seconds to allow the CMOS settings to be cleared.

4. Replace the Jumper

After the CMOS settings have been reset, the jumper can be replaced in its original position. Ensure that the jumper is securely seated in the header to prevent any future issues. Once the jumper is replaced, the CMOS settings will be restored to their default values.

5. Reassemble the System

With the CMOS reset complete, the system can be reassembled. Reconnect the chassis, plug in the computer, and power it on. The computer should now boot up with the default CMOS settings.

6. Verify the CMOS Reset

To verify if the CMOS reset was successful, enter the BIOS setup utility. Typically, this can be done by pressing a specific key during the boot process, such as “F2” or “Del.” Once in the BIOS setup utility, navigate to the “CMOS Setup” or “System Setup” section and check if the settings have been reset to their defaults.

Utilizing the BIOS to Reset CMOS

The BIOS (Basic Input/Output System) is a crucial component of your computer’s hardware, responsible for initiating the boot process and managing basic hardware functions. It also provides a straightforward method to reset the CMOS (Complementary Metal-Oxide-Semiconductor), a small chip that stores essential system settings, such as time, date, and hardware configurations.

Resetting the CMOS can resolve various system issues, including boot problems, incorrect system time, and corrupted BIOS settings. To perform a CMOS reset using the BIOS, follow these steps:

1. Power Off and Unplug the Computer

Begin by shutting down your computer and unplugging it from any power sources. This step is crucial for safety, as working on the computer while it’s powered on can pose a risk of electrical shock.

2. Locate the CMOS Battery

Once the computer is disconnected from power, open the case and locate the CMOS battery. This small, button-shaped battery is usually located on the motherboard, near the BIOS chip. The battery provides power to the CMOS chip, allowing it to retain settings even when the computer is turned off.

3. Carefully Remove the CMOS Battery

Using a pair of tweezers or a small screwdriver, gently pry the CMOS battery from its socket. Avoid touching the battery terminals directly, as this can damage the battery or the motherboard. Once the battery is removed, wait a few minutes for any residual power in the CMOS chip to dissipate.

4. Reinsert the CMOS Battery

After waiting a few minutes, carefully reinsert the CMOS battery into its socket. Ensure that the positive (+) and negative (-) terminals are aligned correctly. Incorrectly inserted batteries can damage the motherboard.

5. Detailed CMOS Reset Procedure Using Jumper Settings

In addition to using the CMOS battery, some motherboards offer an alternative method for resetting the CMOS using jumper settings. These jumpers are small plastic plugs that you can move to change the BIOS settings. To reset the CMOS using jumpers, locate the jumper labeled “CLR CMOS” or “RESET CMOS” on the motherboard. It is usually near the CMOS battery. Refer to your motherboard’s manual for precise instructions. Here’s a detailed step-by-step guide using jumper settings:

Step	Action
1	Locate the “CLR CMOS” or “RESET CMOS” jumper on the motherboard.
2	Note the current position of the jumper. Most motherboards have a default setting that enables the CMOS battery to power the CMOS chip.
3	Move the jumper to the alternative position. For example, if it was on pins 1 and 2, move it to pins 2 and 3.
4	Wait a few seconds for the BIOS settings to reset.
5	Move the jumper back to its original position.
6	Power on the computer and enter the BIOS to verify that the settings have been reset.

6. Power On the Computer and Enter the BIOS

Once the CMOS battery has been reinserted or the jumper has been reset, power on the computer and enter the BIOS by pressing a specific key during the boot process. The key may vary depending on the motherboard manufacturer. Common BIOS access keys include F1, F2, F10, and Del. Refer to your motherboard manual for specific instructions.

7. Reset CMOS Settings in the BIOS

Once you’re in the BIOS, navigate to the settings menu that allows you to reset the CMOS. This option is usually found under the “Advanced” or “Maintenance” tab. The exact location may vary depending on the BIOS version and manufacturer.

8. Save Changes and Exit BIOS

After resetting the CMOS settings, save changes and exit the BIOS. The computer will restart with the default BIOS settings.

9. Reconfigure Necessary Settings

After the computer restarts, you may need to reconfigure certain settings in the BIOS, such as the time and date. This is because resetting the CMOS clears all BIOS settings to their default values.

10. Save and Exit BIOS Again

Once you have reconfigured the necessary settings, save changes and exit the BIOS again. The computer will continue to boot into the operating system.

Removing CMOS Using the Clear CMOS Jumper

1. Turn Off the Computer and Unplug It From the Power Source

Before you begin, turn off your computer and unplug it from the power source. This will prevent any electrical accidents from occurring.

2. Open the Computer Case

Locate the screws that hold the computer case closed and remove them. Carefully lift off the case to expose the computer’s internal components.

3. Locate the CMOS Battery

The CMOS battery is a small, round battery that is usually located near the top of the motherboard. It is often held in place by a metal clip or bracket.

4. Remove the CMOS Battery

Carefully remove the CMOS battery from its socket. You may need to use a small screwdriver to gently pry it out.

5. Wait a Few Minutes

Once the CMOS battery is removed, wait a few minutes for the CMOS settings to be cleared. This will allow the CMOS memory to lose its power and reset to its default settings.

6. Replace the CMOS Battery and Close the Computer Case

After a few minutes, replace the CMOS battery in its socket and close the computer case. Make sure to tighten the screws that hold the case closed.

Additional Notes

* If you do not feel comfortable removing the CMOS battery yourself, you can take your computer to a qualified technician who can do it for you.
* You can also clear the CMOS settings by using the Clear CMOS jumper. This jumper is usually located near the CMOS battery. To use the Clear CMOS jumper, simply move it to the “Clear” position for a few seconds and then move it back to its original position.
* Clearing the CMOS settings will not affect your personal files or programs. However, it will reset your BIOS settings to their default values. This may cause some minor inconvenience, such as having to re-enter your BIOS password or re-configure your boot order.

Resetting CMOS via the CMOS Jumper

The CMOS jumper is a small, two-pin header located on the motherboard. It is used to reset the CMOS memory, which stores the BIOS settings. Resetting the CMOS memory can be useful for troubleshooting computer problems, such as when the computer will not boot up properly. To reset the CMOS memory using the CMOS jumper, follow these steps:

1. Power down the computer and unplug it from the power outlet.

2. Open the computer case.

3. Locate the CMOS jumper on the motherboard. It is usually located near the battery.

4. Use a small screwdriver or tweezers to move the jumper to the “clear” position.

5. Wait a few seconds, then move the jumper back to the “normal” position.

6. Close the computer case.

7. Plug the computer back into the power outlet and turn it on.

The BIOS settings will now be reset to their default values. If the computer still does not boot up properly, there may be a more serious hardware problem that needs to be addressed.

Here are some additional tips for resetting the CMOS memory using the CMOS jumper:

If you cannot find the CMOS jumper, consult your motherboard’s manual for its location.
Some motherboards have a button that can be used to clear the CMOS memory. If your motherboard has this button, you can use it instead of the CMOS jumper.
Resetting the CMOS memory will not erase any data from your hard drive.

The following table summarizes the steps involved in resetting the CMOS memory using the CMOS jumper:

Step	Action
1	Power down the computer and unplug it from the power outlet.
2	Open the computer case.
3	Locate the CMOS jumper on the motherboard.
4	Use a small screwdriver or tweezers to move the jumper to the “clear” position.
5	Wait a few seconds, then move the jumper back to the “normal” position.
6	Close the computer case.
7	Plug the computer back into the power outlet and turn it on.

Employing a Jumper to Clear CMOS

What is a CMOS?

Complementary Metal-Oxide-Semiconductor (CMOS), often referred to as BIOS, is a chip on your motherboard that stores crucial system settings, such as the time and date, boot order, and hardware configurations. Incorrect CMOS settings can lead to system instability, boot failures, or other performance issues.

Why Clear CMOS?

Clearing CMOS is a troubleshooting technique used to reset BIOS to its default settings. This can be necessary if you encounter:

Persistent boot issues
System instability
Corrupted BIOS settings
Overclocking failures

Identifying the CMOS Jumper

The CMOS jumper, labeled “CLR_CMOS” or “CLEAR CMOS,” is typically found near the CMOS battery on the motherboard. It consists of two or three pins connected by a jumper cap. The jumper cap is usually placed over two pins, enabling the CMOS circuit.

Steps to Clear CMOS Using a Jumper

1. Power Down and Unplug: Turn off your computer, unplug it from the power source, and ground yourself by touching a metal object to discharge any static electricity.

2. Open the Case: Remove the screws on the computer case and carefully open the side panel.

3. Locate the CMOS Jumper: Examine your motherboard for the CMOS jumper. It is typically a 2- or 3-pin header labeled “CLR_CMOS” or “CLEAR CMOS.”

4. Remove the Jumper Cap: Carefully remove the jumper cap from the pins. Note the original position of the jumper cap.

5. Short the Pins: Touch a metallic object, such as a screwdriver or tweezers, across the two pins for a few seconds; this shorts the circuit and clears the CMOS settings.

6. Reinstall the Jumper Cap: Return the jumper cap to its original position, connecting the two pins.

7. Reset BIOS Settings: After replacing the jumper cap, boot up your computer and enter the BIOS settings by pressing the designated key (e.g., Del, F2, or F10). Choose the “Load Default” or “Reset to Default” option to restore factory settings.

8. Save Changes and Reboot: Press the F10 key to save the changes and reboot your computer. The system should now start with default BIOS settings.

9. Advanced Jumper Configurations:
Some motherboards may have additional CMOS jumper settings for specific scenarios:

Jumper Position	Function
1-2	Clear CMOS and reset BIOS to default settings
2-3	Enable factory overclock settings (not recommended for inexperienced users)
1-3	Enable custom BIOS settings (used for advanced troubleshooting or specialized configurations)

10. Additional Tips:

Handle the motherboard and jumper cap with care to prevent damage to components.
If you encounter any difficulties or the issue persists, refer to your motherboard manual or consult a qualified technician.
Clearing CMOS using a jumper is a simple and effective method, but it should only be performed when necessary to avoid overwriting important BIOS settings.

Removing CMOS with a Jumper Cap

A jumper cap is a small, plastic or metal piece that fits over two metal pins on a computer motherboard. It is used to short-circuit the pins, which can be used to reset the CMOS settings to their default values. The CMOS stores the BIOS settings and other information necessary for the computer to boot up and run properly.

To remove the CMOS using a jumper cap, follow these steps:

Power down the computer.
Unplug the computer from the power outlet.
Remove the cover from the computer case.
Locate the CMOS battery. It is a small, round battery, typically located near the bottom of the motherboard.
Remove the CMOS battery.
Locate the CMOS jumper. It is typically located near the CMOS battery. It will be labeled with "CLR_CMOS" or "RESET_CMOS".
Place the jumper cap over the two pins on the CMOS jumper.
Wait for 10 seconds.
Remove the jumper cap from the CMOS jumper.
Reinsert the CMOS battery.
Replace the computer case cover.
Plug the computer back into the power outlet.
Power on the computer.

Specifications of Jumper Cap

Characteristics	Details
Shape	Cylindrical, Oval, Square
Size	Small, Less than 1 centimeter in diameter
Material	Plastic, Metal
Color	Varies (Red, Black, White, etc.)
Function	Short-circuit the pins on a computer motherboard
Purpose	Reset the CMOS settings to their default values
Placement	Over two metal pins on a computer motherboard, labeled "CLR_CMOS" or "RESET_CMOS"
Removal	Manual, Using a pair of tweezers or your fingers
Caution	Avoid prolonged contact with skin or clothing, as the jumper cap may be electrified

Resetting CMOS with a Screwdriver

In some cases, you may need to reset the CMOS settings of your computer. This can be done by using a screwdriver to remove the CMOS battery from the motherboard. Here are the detailed steps on how to do it:

Step 1: Power Down the Computer

Before you begin, make sure that the computer is powered down and unplugged from the power outlet.

Step 2: Open the Computer Case

Locate the screws that hold the computer case closed and remove them. Then, carefully lift the side panel of the case to open it.

Step 3: Locate the Motherboard

Once the case is open, you will see the motherboard inside. It is the large green or brown circuit board that contains all of the computer’s components.

Step 4: Find the CMOS Battery

The CMOS battery is a small, round battery that is located on the motherboard. It is usually held in place by a metal clip or a plastic retainer.

Step 5: Remove the CMOS Battery

Using a screwdriver, carefully remove the metal clip or plastic retainer that is holding the CMOS battery in place. Then, gently lift the battery out of its socket.

Step 6: Wait for a Few Minutes

Once the CMOS battery is removed, wait for a few minutes to allow the CMOS settings to reset. This will clear all of the BIOS settings, including the time, date, and boot order.

Step 7: Reinsert the CMOS Battery

After a few minutes, reinsert the CMOS battery into its socket. Make sure that it is properly seated and that the metal clip or plastic retainer is securing it in place.

Step 8: Close the Computer Case

Replace the side panel of the computer case and secure it with the screws. Then, plug the computer back into the power outlet and turn it on.

Step 9: Enter the BIOS Setup

When the computer starts up, you will need to enter the BIOS setup utility to reconfigure the BIOS settings. The key you need to press to enter the BIOS setup utility will vary depending on your computer’s motherboard. Consult your computer’s documentation to find out the correct key.

Step 10: Reconfigure the BIOS Settings

Once you are in the BIOS setup utility, you will need to reconfigure the BIOS settings to your desired preferences. This includes setting the time and date, configuring the boot order, and enabling or disabling various features.

Step 11: Save the BIOS Settings and Exit

After you have reconfigured the BIOS settings, save the changes and exit the BIOS setup utility. The key you need to press to save the changes and exit will vary depending on your computer’s motherboard. Consult your computer’s documentation to find out the correct key.

Step 12: Troubleshooting Tips

If you encounter any problems after resetting the CMOS, try the following troubleshooting tips:

Problem	Solution
The computer does not start up.	Make sure that the CMOS battery is properly seated and that the metal clip or plastic retainer is securing it in place.
The BIOS settings are not saved after I exit the BIOS setup utility.	Make sure that the CMOS battery is new and that it is providing enough power to the motherboard.
The computer does not recognize the hard drive.	Make sure that the hard drive is properly connected to the motherboard and that the BIOS settings are configured to recognize the hard drive.

Clearing CMOS with the Clear CMOS Pin

Instructions for Clearing CMOS with the Clear CMOS Pin

Step 1: Locate the Clear CMOS Pin

The Clear CMOS pin is typically located near the CMOS battery on the motherboard. It is usually labelled with “CLR_CMOS” or “CCMOS.” Identify the pin carefully as it can be easily confused with other pins on the motherboard.

Step 2: Prepare the Jumper Cap

Obtain a jumper cap, which is a small plastic connector with two metal pins. Ensure that the jumper cap is not shorting the metal pins, as this could damage the motherboard.

Step 3: Bridge the Clear CMOS Pin

Place the jumper cap over the Clear CMOS pin. Ensure that both metal pins of the jumper cap are making contact with the corresponding pins on the motherboard.

Step 4: Wait for 10-15 Seconds

Keep the jumper cap in place for approximately 10-15 seconds. This is the recommended time for the CMOS to be cleared.

Step 5: Remove the Jumper Cap

Once the waiting period is over, carefully remove the jumper cap from the Clear CMOS pin.

Step 6: Power On the System

Power on the computer system. The CMOS settings should now be reset to default values.

Step 7: Enter BIOS Settings

Press the BIOS setup key (usually Del, F2, or F10) to enter the BIOS settings.

Step 8: Verify CMOS Reset

In the BIOS settings, check the system settings to ensure that the CMOS has been reset to default values. This may include the date, time, and system configuration settings.

Step 9: Exit BIOS and Save Changes

Once you have confirmed the CMOS reset, exit the BIOS settings and save the changes.

Step 10: Reboot the System

Reboot the computer system to complete the CMOS reset process.

Resetting CMOS with a Jumper

This method is slightly more complex than the previous one, but it is still relatively easy to do. To reset the CMOS using a jumper, follow these steps:

Power down your computer and unplug it from the power outlet.
Open your computer case.
Locate the CMOS jumper. It will typically be a small, two-pin jumper near the CMOS battery.
Remove the jumper from its current position and place it on the two pins that are labeled “CLR CMOS” or “CLEAR.”
Wait a few seconds, then replace the jumper to its original position.
Close your computer case and plug it back into the power outlet.
Power on your computer and enter the BIOS setup menu.
Load the default BIOS settings.
Save your changes and exit the BIOS setup menu.

Your CMOS has now been reset.

Advanced Tips for Resetting CMOS with a Jumper

Here are a few advanced tips that may be helpful when resetting the CMOS using a jumper:

Be careful not to short the jumper pins. If you do, you could damage your motherboard.
If you are not sure which pins to use, consult your motherboard’s manual.
You may need to use a pair of tweezers to remove the jumper.
If you are still having trouble resetting the CMOS, you may need to contact a qualified computer technician.

Troubleshooting Tips for Resetting CMOS with a Jumper

If you are having trouble resetting the CMOS using a jumper, here are a few troubleshooting tips:

Make sure that the jumper is firmly seated in the correct position.
Try removing and reinserting the jumper several times.
If you are still having trouble, try using a different jumper.
If you are still having trouble, you can reset the CMOS by removing the CMOS battery for 30 minutes.

Method	Pros	Cons
Resetting CMOS with a Jumper	Easy to do	Requires opening the computer case
Resetting CMOS with a CMOS Battery	No need to open the computer case	May not be as effective as using a jumper

Bypassing CMOS Using a Jumper

1. Power down your computer and unplug it from the power outlet.

This is a crucial step as it ensures that there is no power flowing through the motherboard, which could damage the components or cause injury.

2. Locate the CMOS jumper on the motherboard.

The CMOS jumper is typically located near the CMOS battery, which is a small, round battery that powers the CMOS chip.

3. Remove the jumper from its current position.

Gently pull the jumper straight up from the pins.

4. Move the jumper to the “Clear CMOS” pins.

The “Clear CMOS” pins are usually labeled on the motherboard. If not, consult the motherboard manual for the correct location.

5. Wait a few seconds for the CMOS to clear.

This allows the CMOS chip to discharge any residual power and reset its settings.

6. Move the jumper back to its original position.

Once the CMOS has cleared, gently push the jumper back onto the pins in its original location.

7. Plug your computer back into the power outlet and power it on.

The computer will now boot with the default CMOS settings.

Additional Tips:

If you are unable to locate the “Clear CMOS” pins on your motherboard, you can try removing the CMOS battery for a few minutes. This will also clear the CMOS settings.
If you are still having problems clearing the CMOS, you can try updating the BIOS. This can be done by downloading the latest BIOS update from the manufacturer’s website and following the instructions provided.

Troubleshooting:

Problem	Solution
Computer does not boot after clearing CMOS	Ensure that the jumper is correctly seated in its original position. Try reseating the CMOS battery as well.
Computer boots with incorrect settings after clearing CMOS	Update the BIOS to the latest version. This may resolve any compatibility issues with the motherboard and CMOS chip.

Using a Jumper to Reset CMOS

Resetting your CMOS using a jumper is a quick and easy way to restore your BIOS settings to their default values. Here’s a step-by-step guide on how to do it:

1. Shut Down and Unplug Your Computer

Before you begin, make sure to turn off your computer and unplug it from the power outlet. Static electricity can damage computer components, so it’s essential to discharge any static electricity before touching the motherboard.

2. Locate the Motherboard

Open your computer case and locate the motherboard. The motherboard is the large green circuit board that contains the CPU, RAM, and other computer components.

3. Find the CMOS Jumper

The CMOS jumper is usually located near the bottom of the motherboard. It will be labeled “CLRTC,” “CMOS,” or “RESET.” It typically consists of two or three pins, and a small jumper block will be placed over two of the pins.

4. Remove the Jumper

Gently remove the jumper block from the two pins. Do not force the jumper; it should come off easily.

5. Wait a Few Seconds

Wait about 10 seconds with the jumper removed. This will give the CMOS time to discharge and reset the BIOS settings.

6. Replace the Jumper

After 10 seconds, place the jumper block back over the two pins. Make sure the jumper is securely in place.

7. Power On Your Computer

Plug your computer back into the power outlet and turn it on. The computer will start up with the default BIOS settings.

Additional Tips:

Here are some additional tips to keep in mind when resetting your CMOS using a jumper:

If you cannot find the CMOS jumper, consult your motherboard manual for its location.
If you accidentally short the wrong pins, it can damage your motherboard. Be careful not to touch any other components on the motherboard.
Resetting the BIOS to default settings may erase your overclocking settings. If you have made any changes to your overclock settings, make sure to note them down before resetting the CMOS.
Resetting the CMOS will not erase your data. Your files and programs will still be intact.

Troubleshooting:

If you encounter any problems when resetting your CMOS using a jumper, here are some troubleshooting tips:

Make sure that the jumper is securely in place. If the jumper is loose, it may not make proper contact with the pins.
Try removing and replacing the jumper a few times. This can help to ensure a good connection between the jumper and the pins.
If you still cannot reset the CMOS, consult your motherboard manual for further troubleshooting steps.

Removing CMOS with a Reset Switch

Step 1: Locate the Reset Switch

The reset switch is typically a small button or jumper located on the motherboard. It may be labeled “Reset,” “Clear CMOS,” or “Clear RTC.” Consult your motherboard’s user manual for its precise location.

Step 2: Power Down the Computer

Before performing any hardware modifications, ensure that your computer is completely powered down. Turn off the system, unplug the power cord, and wait a few minutes for any residual power to dissipate.

Step 3: Open the Computer Case

Remove the screws securing the computer case’s side panel and carefully open it to expose the motherboard.

Step 4: Identify the CMOS Battery

The CMOS battery is usually a small, round battery, approximately the size of a nickel. It is typically located near the reset switch or the BIOS chip.

Step 5: Remove the CMOS Battery

Gently pry the CMOS battery out of its socket using a plastic tool or your fingernail. Be careful not to damage the battery or the motherboard.

Step 6: Wait 15-30 Seconds

This step is crucial for allowing the CMOS memory to discharge completely. Without power, the stored BIOS settings will be erased.

Step 7: Reinsert the CMOS Battery

Align the new or old CMOS battery correctly and carefully press it back into its socket. Ensure it fits snugly and makes contact.

Step 8: Close the Computer Case

Replace the side panel of the computer case and secure it with the screws.

Step 9: Power On the Computer

Reconnect the power cord and turn on the computer. The BIOS settings should now be reset to their default values.

Step 10: Configure BIOS Settings

Upon boot-up, you may be prompted to enter the BIOS setup utility. Here, you can reconfigure the BIOS settings according to your preferences.

Step 11: Reconnect Peripherals

Once the BIOS settings are configured, reconnect any peripherals that were previously disconnected and power on the computer.

Resetting CMOS with a Switch

Many motherboards have a physical switch that you can use to reset the CMOS. This switch is usually located near the battery on the motherboard. To reset the CMOS using the switch, simply follow these steps:

1. Turn off your computer and unplug it from the power outlet.
2. Locate the CMOS reset switch on the motherboard.
3. Use a small screwdriver or other pointed object to press and hold the switch for a few seconds.
4. Release the switch and plug your computer back into the power outlet.
5. Turn on your computer and enter the BIOS setup menu.
6. Load the optimized defaults and save your changes.
7. Exit the BIOS setup menu and restart your computer.

Additional Information on Resetting CMOS with a Switch

Here are some additional details about resetting CMOS with a switch:

The CMOS reset switch is usually a small, black button. It may be labeled “CMOS Reset” or “CLR CMOS.”
If you can’t find the CMOS reset switch on your motherboard, consult your motherboard’s manual.
Resetting the CMOS will clear all of the BIOS settings to their default values. This includes the time and date, the boot order, and the overclocking settings.

Resetting the CMOS can be useful if your computer is not booting properly or if you want to restore the BIOS settings to their default values.

Troubleshooting Problems with Resetting CMOS with a Switch

If you are having problems resetting the CMOS with a switch, try the following:

Make sure that you are pressing the switch for long enough.
Try using a different screwdriver or other pointed object to press the switch.

If you still can’t reset the CMOS, consult your motherboard’s manual or contact the manufacturer for assistance.

Resetting CMOS with a Jumper

If your motherboard does not have a CMOS reset switch, you can reset the CMOS using a jumper. Here are the steps:

Step	Description
1	Turn off your computer and unplug it from the power outlet.
2	Locate the CMOS jumper on the motherboard.
3	Find the jumper’s default position.
4	Move the jumper to the reset position.
5	Wait a few seconds and then move the jumper back to its default position.
6	Plug your computer back into the power outlet and turn it on.
7	Enter the BIOS setup menu and load the optimized defaults.
8	Exit the BIOS setup menu and restart your computer.

Troubleshooting Problems with Resetting CMOS with a Jumper

If you are having problems resetting the CMOS with a jumper, try the following:

Make sure that you are moving the jumper to the correct position.
Try using a different jumper.

If you still can’t reset the CMOS, consult your motherboard’s manual or contact the manufacturer for assistance.

Using a Button to Reset CMOS

If your motherboard has a dedicated CMOS reset button, the process is straightforward:

Power off your computer and unplug it from the power supply.
Locate the CMOS reset button on your motherboard. It’s typically a small button labeled “CMOS Reset” or “CLR CMOS” near the battery.
Press and hold the button for about 10 seconds. This discharges the residual charge in the CMOS memory, resetting it to its default values.
Reattach the battery and power on your computer. The BIOS settings will be restored to their defaults.

Additional Notes:

Some motherboards may require you to press the button for a shorter or longer duration. Consult your motherboard’s manual for precise instructions.
If you’re using a laptop, the CMOS reset button may be located under the keyboard. Refer to your laptop’s user manual for specific instructions.
If the CMOS reset button is not accessible, you can try using a jumper to short the CMOS reset pins on the motherboard. Please note that this method requires technical expertise and should be attempted only by experienced users.

Advantages of Using a Button to Reset CMOS:

Quick and easy method.
Does not require disassembly of the system.
No risk of damaging the motherboard by accidentally shorting the wrong pins.

Disadvantages of Using a Button to Reset CMOS:

Not all motherboards have a dedicated CMOS reset button.
May not be accessible on laptops.

Removing CMOS with the BIOS Settings

Resetting the CMOS is a simple process that can be done in a few minutes. Here are the steps on how to do it:

1. Shutdown your computer.

Unplug the computer from the power outlet.

2. Open the computer case.

Locate the CMOS battery on the motherboard. It is usually a small, round battery that is held in place by a metal clip.

3. Remove the CMOS battery.

Use your finger or a pair of tweezers to gently pry the battery out of its socket.

4. Wait for 10 minutes.

This will give the CMOS time to reset.

5. Replace the CMOS battery.

Insert the new battery into the socket, making sure that the positive terminal is facing up.

6. Close the computer case.

Plug the computer back into the power outlet and turn it on.

7. Enter the BIOS settings.

When the computer starts up, press the key that is displayed on the screen to enter the BIOS settings. This key is usually F1, F2, or Del.

8. Navigate to the “Exit” menu.

Use the arrow keys to navigate to the “Exit” menu.

9. Select the “Load Default Settings” option.

Press the Enter key to select the “Load Default Settings” option.

10. Confirm the changes.

Press the Enter key again to confirm the changes and exit the BIOS settings.

11. Save the changes and exit.

Press the F10 key to save the changes and exit the BIOS settings.

12. Restart the computer.

The computer will now restart with the default BIOS settings.

13. Enter the BIOS settings again.

Once the computer has restarted, press the key that is displayed on the screen to enter the BIOS settings again.

14. Navigate to the “Security” menu.

Use the arrow keys to navigate to the “Security” menu.

15. Select the “Set Supervisor Password” option.

Press the Enter key to select the “Set Supervisor Password” option.

16. Enter a new password.

Enter a new password in the field provided. The password must be at least 8 characters long and contain at least one uppercase letter, one lowercase letter, and one number.

17. Re-enter the password.

Enter the password again in the field provided to confirm it.

18. Press the Enter key.

Press the Enter key to save the new password and exit the BIOS settings.

19. Restart the computer.

The computer will now restart with the new password.

20. Enter the BIOS settings again.

Once the computer has restarted, press the key that is displayed on the screen to enter the BIOS settings again.

21. Navigate to the “Security” menu.

Use the arrow keys to navigate to the “Security” menu.

22. Select the “Clear CMOS Settings” option.

Press the Enter key to select the “Clear CMOS Settings” option.

23. Confirm the changes.

Press the Enter key again to confirm the changes and exit the BIOS settings.

24. Restart the computer.

The computer will now restart with the CMOS settings cleared.

25. Enter the BIOS settings again.

Once the computer has restarted, press the key that is displayed on the screen to enter the BIOS settings again.

26. Configure the BIOS settings.

Use the arrow keys to navigate to the BIOS settings that you want to change. Press the Enter key to select a setting and then use the arrow keys to change the value. Press the F10 key to save the changes and exit the BIOS settings.

Option	Description
Load Optimized Defaults	Loads the optimized default settings for the motherboard.
Load Custom Defaults	Loads the custom default settings that you have saved.
Exit Saving Changes	Saves the changes that you have made to the BIOS settings and exits the BIOS.
Exit Discarding Changes	Discards the changes that you have made to the BIOS settings and exits the BIOS.

Using the Jumper to Reset CMOS

The jumper method of resetting CMOS is the most common and straightforward.

To use the jumper, you will need to locate the CMOS jumper on your motherboard. The jumper is typically a small, two-pin connector that is located near the CMOS battery.

Once you have located the CMOS jumper, you will need to move the jumper to the “clear” or “reset” position. This will typically be indicated by a marking on the motherboard next to the jumper.

Here are the steps for resetting CMOS using the jumper:

1. Power down your computer and unplug it from the power outlet.
2. Open your computer case.
3. Locate the CMOS jumper on your motherboard.
4. Move the jumper to the “clear” or “reset” position.
5. Wait for 30 seconds.
6. Move the jumper back to its original position.
7. Close your computer case.
8. Plug your computer back into the power outlet.
9. Power on your computer.

Additional Notes

* If you cannot find the CMOS jumper on your motherboard, you can consult your motherboard’s manual for its location.
* Some motherboards have a built-in reset button that can be used to reset CMOS. If your motherboard has a reset button, you can use it instead of the jumper.
* If you are resetting CMOS because you are having problems with your computer, you may also want to try resetting the BIOS. The BIOS is a set of settings that control the basic functions of your computer. Resetting the BIOS can sometimes resolve problems that cannot be fixed by resetting CMOS.
* To reset the BIOS, you will need to enter the BIOS setup menu. The BIOS setup menu is typically accessed by pressing a specific key during the boot process. The key that you need to press will vary depending on your motherboard.

Clearing CMOS with the Jumper Switch

Step 36: Locate the CMOS Jumper

The CMOS jumper is typically a two-pin or three-pin header located on the motherboard near the CMOS battery. It is usually labeled “CMOS,” “CLR CMOS,” or “RESET.” Consult your motherboard manual for the exact location and orientation of the jumper.

Step 37: Power Down the System

Turn off the computer and unplug the power cord from the wall outlet to ensure that there is no residual power in the system.

Step 38: Remove the Case Panel

Open the computer case by removing the side panel or accessing the area where the motherboard is located.

Step 39: Identify the Jumper Pins

Locate the CMOS jumper on the motherboard and identify the two or three pins that are involved. They are usually labeled with numbers or letters, such as “1-2” or “A-B,” to indicate the correct jumper positions.

Step 40: Remove the Existing Jumper

If a jumper is already installed on the CMOS header, gently remove it using a pair of tweezers or needle-nose pliers. Note the original position of the jumper so that you can reinstall it correctly later.

Step 41: Wait Several Minutes

Allow the system to discharge any remaining power for several minutes. This will ensure that the CMOS settings are completely reset.

Step 42: Place the Jumper in the Correct Position

Referring to your motherboard manual, determine the correct jumper position for resetting the CMOS. Usually, the jumper should be moved to a position that connects two different pins, such as “1-2” or “A-B.”

Step 43: Insert the Jumper

Carefully insert the jumper onto the CMOS header in the correct orientation. Make sure that the jumper pins are securely in contact with the header pins.

Step 44: Wait Several Seconds

Allow the system to initialize for a few seconds while the CMOS settings are being reset.

Step 45: Remove the Jumper

Once the CMOS reset has been completed, gently remove the jumper from the header and reinstall it in its original position.

Step 46: Replace the Case Panel

Close the computer case and replace the side panel or access door.

Step 47: Power On the System

Plug the power cord back into the wall outlet and turn on the computer. The computer will now boot up with the default CMOS settings.

Step 48: Check BIOS Settings

After the system boots up, enter the BIOS or UEFI settings to verify that the CMOS settings have been reset to the default values.

Step 49: Reconfigure BIOS Settings

If desired, reconfigure the BIOS settings to your preferred values or to accommodate any hardware changes you may have made.

Step 50: Save and Exit BIOS

Save your changes and exit the BIOS or UEFI settings. The system will now operate with the updated CMOS settings.

Removing CMOS with the CMOS Reset Jumper

The CMOS reset jumper is a small, two-pin jumper that is located on the motherboard. It is used to reset the CMOS memory, which stores the computer’s BIOS settings. Resetting the CMOS memory can be useful if the computer is not booting properly or if you want to clear the BIOS settings to their default values.

Finding the CMOS Reset Jumper

The location of the CMOS reset jumper varies depending on the motherboard. However, it is typically located near the CMOS battery. The CMOS battery is a small, coin-shaped battery that is used to power the CMOS memory. Once you have located the CMOS battery, look for a small, two-pin jumper next to it. The jumper will usually be labeled “CMOS Reset” or “CLR CMOS”.

Resetting the CMOS Memory

To reset the CMOS memory, simply remove the CMOS reset jumper from the motherboard and wait for a few seconds. Then, replace the jumper on the motherboard. The CMOS memory will now be reset to its default values.

Additional Tips

Here are a few additional tips for resetting the CMOS memory:

Before you reset the CMOS memory, make sure that you have written down the BIOS settings. This will help you to restore the BIOS settings to their original values if necessary.
If you cannot find the CMOS reset jumper, you can also reset the CMOS memory by removing the CMOS battery from the motherboard. However, this method is not as effective as using the CMOS reset jumper.
If you are still having problems with your computer after resetting the CMOS memory, you may need to contact a computer technician for assistance.

Removing the CMOS Battery

The CMOS battery is a small, coin-shaped battery that is used to power the CMOS memory. Removing the CMOS battery will reset the CMOS memory to its default values. This can be useful if the computer is not booting properly or if you want to clear the BIOS settings to their default values.

Finding the CMOS Battery

The location of the CMOS battery varies depending on the motherboard. However, it is typically located near the CMOS reset jumper. The CMOS battery is usually held in place by a small clip. To remove the CMOS battery, simply unclip it from the motherboard.

Removing the CMOS Battery

Once you have unclipped the CMOS battery, simply pull it out of the motherboard. Wait for a few seconds, then reinsert the CMOS battery into the motherboard. The CMOS memory will now be reset to its default values.

Additional Tips

Here are a few additional tips for removing the CMOS battery:

Before you remove the CMOS battery, make sure that you have written down the BIOS settings. This will help you to restore the BIOS settings to their original values if necessary.
If you cannot find the CMOS battery, you can also reset the CMOS memory by using the CMOS reset jumper. However, this method is not as effective as removing the CMOS battery.
If you are still having problems with your computer after removing the CMOS battery, you may need to contact a computer technician for assistance.

Table of CMOS Reset Methods

Resetting CMOS with the Block

To reset the CMOS using the block, follow these steps:

Power down your computer and unplug it from the power outlet.
Locate the CMOS battery on the motherboard. It is usually a small, silver battery about the size of a dime.
Use a pair of tweezers or a small screwdriver to gently remove the battery from the motherboard.
Wait for 30 seconds to allow the CMOS to reset.
Reinsert the CMOS battery into the motherboard.
Plug your computer back into the power outlet and power it on.

43. Troubleshooting Tips

If you are having trouble resetting the CMOS using the block, here are some troubleshooting tips:

Make sure that you are using the correct type of battery for your motherboard. The CMOS battery is usually a CR2032 battery.
Make sure that the battery is making good contact with the motherboard. The battery should be snugly fit into the battery holder.
If you are still having trouble, try resetting the CMOS using the jumper method.

43.1 Resetting CMOS Using the Jumper Method

To reset the CMOS using the jumper method, follow these steps:

Power down your computer and unplug it from the power outlet.
Locate the CMOS jumper on the motherboard. It is usually located near the CMOS battery.
Use a pair of tweezers or a small screwdriver to move the jumper from its current position to the “Clear” position.
Wait for 30 seconds to allow the CMOS to reset.
Move the jumper back to its original position.
Plug your computer back into the power outlet and power it on.

43.2 Jumper Settings

The following table shows the jumper settings for different types of motherboards:

Motherboard Type	Jumper Setting
AMI BIOS	Clear CMOS
Award BIOS	Default CMOS
Phoenix BIOS	Password Reset

Clearing CMOS with the CMOS Clear Switch

The CMOS clear switch is a physical button or jumper on the motherboard that allows you to reset the CMOS settings to their default values. This can be useful if you’ve made changes to the CMOS settings and your computer is not booting properly, or if you simply want to restore the settings to their original state.

To clear the CMOS settings using the CMOS clear switch, follow these steps:

Turn off your computer and unplug it from the power outlet.
Open the computer case.

Locate the CMOS clear switch on the motherboard. The switch is usually located near the CMOS battery, and it may be labeled “CMOS Clear” or “CLR CMOS.”

The CMOS clear switch can come in different forms, depending on the motherboard. It can be a physical button, a jumper, or a DIP switch. Here are the different types of CMOS clear switches and how to use them:

Physical button: Press the button for a few seconds and then release it.

Jumper: Move the jumper from the default position to the “Clear CMOS” position for a few seconds and then move it back to the default position.

DIP switch: Find the DIP switch labeled “Clear CMOS” or “CLR CMOS” and flip the switch to the “ON” position for a few seconds and then flip it back to the “OFF” position.

Types of CMOS Clear Switches
Switch Type	How to Use
Physical button	Press the button for a few seconds and then release it.
Jumper	Move the jumper from the default position to the “Clear CMOS” position for a few seconds and then move it back to the default position.
DIP switch	Find the DIP switch labeled “Clear CMOS” or “CLR CMOS” and flip the switch to the “ON” position for a few seconds and then flip it back to the “OFF” position.

Close the computer case and plug it back into the power outlet.
Turn on your computer and check if the CMOS settings have been reset.

If you don’t have a CMOS clear switch on your motherboard, you can also clear the CMOS settings by removing the CMOS battery for a few minutes. To do this, follow these steps:

Turn off your computer and unplug it from the power outlet.
Open the computer case.
Locate the CMOS battery on the motherboard. The battery is usually a small, round, silver battery.
Use your finger or a pair of pliers to gently remove the battery from the motherboard.
Wait for a few minutes and then reinsert the battery into the motherboard.
Close the computer case and plug it back into the power outlet.
Turn on your computer and check if the CMOS settings have been reset.

Removing CMOS with the CMOS Clear Button

The CMOS clear button is a small button located on the motherboard that allows you to reset the CMOS settings to their default values. This can be useful if you are experiencing problems with your computer, or if you have made changes to the CMOS settings that you want to undo.

To remove CMOS using the CMOS clear button, follow these steps:

Power down your computer and unplug it from the power outlet.
Open the case of your computer.
Locate the CMOS clear button on the motherboard. It will typically be a small, black button located near the CMOS chip.
Press and hold the CMOS clear button for a few seconds.
Release the CMOS clear button.
Close the case of your computer.
Plug your computer back into the power outlet and power it on.

Your CMOS settings will now be reset to their default values.

Additional Information:

In some cases, the CMOS clear button may not be accessible from the outside of the computer case. If this is the case, you may need to remove the motherboard from the case in order to access the button.

If you are not comfortable removing the motherboard from the case, you can also try resetting the CMOS settings using the jumper method.

Removing CMOS with the Jumper Method:

The jumper method is another way to reset the CMOS settings to their default values. To do this, you will need to locate the CMOS jumper on the motherboard. The CMOS jumper is typically a two-pin jumper that is located near the CMOS chip.

To reset the CMOS settings using the jumper method, follow these steps:

Power down your computer and unplug it from the power outlet.
Open the case of your computer.
Locate the CMOS jumper on the motherboard.
Move the jumper to the "Clear" or "Default" position.
Wait a few seconds, then move the jumper back to its original position.
Close the case of your computer.
Plug your computer back into the power outlet and power it on.

Your CMOS settings will now be reset to their default values.

Additional Information:

The jumper method may not be available on all motherboards. If you are not sure if your motherboard supports the jumper method, consult your motherboard’s documentation.

If you are experiencing problems with your computer after resetting the CMOS settings, you may need to update the BIOS.

Clearing CMOS with the CMOS Reset Header

The CMOS reset header is the most common way to clear CMOS. It is usually a two-pin header located near the CMOS chip.

1. Turn off the computer and unplug it from the power outlet.
2. Open the computer case.
3. Locate the CMOS reset header. It is usually labeled “CMOS” or “CLR_CMOS”.
4. Use a jumper to short the two pins of the CMOS reset header. You can use a metal screwdriver or a pair of tweezers.

5. Hold the jumper in place for a few seconds.
6. Remove the jumper.
7. Close the computer case.
8. Plug the computer back into the power outlet and turn it on.

The CMOS has now been cleared.

Here are some additional details about step 4:

* If you don’t have a jumper, you can use a piece of wire or a paperclip to short the two pins.
* Be careful not to touch the other components on the motherboard when you are shorting the pins.
* If you are using a screwdriver, be sure to use a non-magnetic screwdriver.
* Hold the jumper in place for at least 10 seconds.
* If you are clearing the CMOS because you are having problems with your computer, you may need to try other troubleshooting steps before the problem is resolved.

Removing CMOS with the CMOS Reset Pins

The CMOS reset pins are two small pins located on the motherboard. They are typically labeled “CLRTC” or “CLR_CMOS.” To reset the CMOS settings with the reset pins, follow these steps:

1. Power down the computer

Make sure that the computer is completely powered off before you begin. Unplug the power cord from the back of the computer.

2. Open the computer case

Remove the screws that hold the computer case in place and lift the case off of the motherboard.

3. Locate the CMOS reset pins

The CMOS reset pins are typically located near the CMOS battery. They are two small, metal pins that are labeled “CLRTC” or “CLR_CMOS.”

4. Short the CMOS reset pins

Use a metal object, such as a screwdriver or a pair of tweezers, to short the CMOS reset pins. Touch the metal object to both pins at the same time for about 10 seconds.

5. Power up the computer

Once you have shorted the CMOS reset pins, plug the power cord back into the computer and turn it on. The computer will boot up with the default CMOS settings.

Additional Tips

If you cannot find the CMOS reset pins on your motherboard, consult your motherboard’s manual for more information.
Resetting the CMOS will erase all of the settings in the CMOS, including the time and date. You will need to re-enter these settings after you reset the CMOS.
Resetting the CMOS can sometimes fix problems that are caused by incorrect BIOS settings. However, it is important to note that resetting the CMOS will not fix hardware problems.

How To Remove CMOS

The CMOS battery is a small coin-shaped battery that powers the computer’s CMOS chip. The CMOS chip stores the computer’s BIOS settings, including the time, date, and boot order. If the CMOS battery dies, the BIOS settings will be lost and the computer will not be able to boot.

To remove the CMOS battery, you will need to:

Power down the computer and unplug it from the power outlet.
Open the computer case.
Locate the CMOS battery. It is usually a small, round battery located near the motherboard.
Use a pair of tweezers to gently pry the CMOS battery out of its socket.
Dispose of the old CMOS battery properly.
Insert a new CMOS battery into the socket.
Close the computer case and plug it back into the power outlet.
Power on the computer and check the BIOS settings to make sure they are correct.