How to Restore the BIOS for a Gigabyte

By Allison Travis

Updated February 10, 2017

Restore the BIOS on a Gigabyte motherboard by resetting the CMOS memory to the default condition. If the computer boots, but you are not able to access the BIOS, you can reset the CMOS memory by removing the battery, moving a jumper on the motherboard or debugging through Windows.

Reset CMOS Memory Using the Jumper

Power down the PC.

Locate the rocker-style switch at the back of the PC, if applicable, and switch it to the off position (O). If there is no switch, disconnect the power cord from power supply.

Open the computer case and locate the 3-pin jumper on the motherboard near the power supply, typically labeled "clear cmos" or "reset bios."

Remove the jumper from the default position, which is typically connecting the 1st and 2nd pins. Wait one minute.

Replace the jumper to connect the 2nd and 3rd pins.

Push the power button on the front of the PC once and wait one minute.

Return the jumper to its default position, connecting the 1st and 2nd pins.

Move the rocker-style switch at the back of the PC to the on (I) position or reconnect the power supply.

Power on the PC with its front power button.

Reset the CMOS Memory by Replacing the Battery

Power down the PC. Unplug and remove the power cord from the computer.

Open the computer and look for a button battery, which is usually bigger than the ones in a watch.

Remove the battery for for ten minutes.

Replace the battery and power up the computer.

Attempt to access BIOS. This method may restore the CMOS memory to the default setting and allow access to the BIOS. If you still are not able to access BIOS, try a different method.

Debug the BIOS Through Windows

Open a command prompt by navigating to the Start menu, then "Run." Type "CMD" and press "Enter."

Type "debug" and press "Enter."

Type the following code:

"-o 70 10" [enter] "-o 71 20" [enter] "quit" [enter]

Exit the command prompt.

Restart the computer.


Remember to configure the BIOS after this process or leave the BIOS with the default settings. Without custom configuration, most systems function adequately with the default BIOS settings. If you do not know how to configure the BIOS, leave the default settings to ensure that you do not damage the PC.


Unplug the computer prior to removing the case. Ground yourself before handling any components inside a PC to reduce the risk of electrostatic discharge damaging the PC.