What’s CMOS and The way to Reset


What is CMOS and How to Reset

What’s CMOS

CMOS (Complementary Metallic-Oxide-Semiconductor) is a sort of know-how utilized in digital units similar to computer systems, smartphones, and digital cameras. It’s a sort of semiconductor that permits for low energy consumption, excessive pace, and compact measurement.

In a pc, the CMOS is a small battery-powered chip that shops essential system data such because the date, time, and {hardware} configuration. It’s used to maintain observe of the BIOS (Fundamental Enter/Output System) settings, which management how the pc interacts with its {hardware} elements. With out the CMOS chip, a pc wouldn’t have the ability to begin up accurately as a result of it couldn’t retailer that very primary knowledge.

Typically, the chip could turn into corrupted, resulting in errors within the system’s {hardware} configuration. This can lead to points similar to incorrect date and time, error messages throughout startup, and system crashes. To repair these points, it’s possible you’ll have to reset the CMOS chip.

Resetting the CMOS chip includes clearing all the info saved in it, together with the BIOS settings. This may revert the system to its default {hardware} configuration, which might repair any errors brought on by a corrupted CMOS chip.

cmos battery located

The way to Reset CMOS

To reset the CMOS chip, you’ll need to comply with these steps:

Step 1: Flip off your laptop and unplug it from the facility supply.

Step 2: Open the pc case and find the CMOS battery. It’s normally a small silver disk-shaped battery situated on the motherboard.

Step 3: Take away the battery by gently pushing down on the retaining clip and pulling it out of its socket.

Step 4: Anticipate 10-Quarter-hour to make sure that all the info saved within the chip is cleared.

Step 5: Reinsert the battery again into its socket, ensuring that it’s inserted accurately.

Step 6: Shut the pc case and plug within the energy supply.

Step 7: Flip in your laptop and enter the BIOS setup utility by urgent the designated key throughout startup. The important thing could range relying on the pc’s producer, however it’s normally F2, F10, or Del.

Step 8: As soon as within the BIOS setup utility, you’ll need to reconfigure the system’s {hardware} settings to your most popular configuration. This will embrace setting the date and time, choosing the boot gadget, and configuring the CPU and reminiscence settings.


The CMOS know-how is a vital part of contemporary digital units, permitting for quicker, extra environment friendly, and extra dependable efficiency. In the event you expertise points along with your laptop’s {hardware} configuration, resetting the CMOS chip could also be a helpful troubleshooting step. Nonetheless, it is very important word that resetting the CMOS chip will clear all the info saved in it, together with the BIOS settings. Due to this fact, it’s important to backup your BIOS settings earlier than resetting  to keep away from shedding any essential configuration knowledge.

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This content material was written by the professional Velocity Micro workers.


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