The CMOS battery is an often overlooked but crucial element. Hidden on the motherboard of your computer, it acts like an emergency power supply for the BIOS.

Alternatively, another way you can reset the CMOS — and one that's more or less standard across all motherboards — is to physically remove and re-seat the CMOS battery on the motherboard.

A CMOS chip is vastly different than the CMOS battery on your motherboard. Introduction: What is “CMOS”? CMOS is a MOSFET-type technology used for logical operations. In simple terms, it is … ...

Locate the CMOS battery on your motherboard. Gently pull it out of the socket. Wait for a few minutes and reinsert the battery with the correct polarity.

Once you are sure that the positive pole of the battery is visible, gently remove the battery, taking care not to touch any other part of the motherboard. Go to your local tech parts retailer, and buy ...

This is all strong evidence that the CMOS battery needs to be replaced. But the motherboard is only 2 years old. I have a 386 that still has a good CMOS battery. How can the battery die so quickly?

Fix The CMOS checksum is invalid, The CMOS will reset to the default configuration, and the computer will restart CMOS, Reset (502) on HP PC.

When the clock resets every time the computer turns on, it’s time to replace the backup battery on its motherboard.

I don’t think the driver-update utility is to blame here, but rather a poorly timed CMOS-battery failure. See, most desktop motherboards have a small battery that supplies power to the BIOS even ...