Ensure your GPU is properly seated and the power connection is working as it should.

Its as simple as that.

This leads to inconsistencies between the UEFI or BIOS configs.

Troubleshooting Motherboard Error 99

To solve this problem, you oughta open your PC case and then manually remove the CMOS battery.

Depending on your gadget, this may prove to be quite a complex operation.

Some laptop modems may require you to take everything apart so that reach the CMOS battery.

bios setup defaults

If youre not very tech-savvy, its best to have a professional help you out with that.

uefi firmware settings windows 10