Gigabyte Aorus Master X570 encountering error 90
Gigabyte Aorus Master X570 encountering error 90
Others also faced issues with this motherboard. Highly likely it was damaged during a system crash. I was using Maya, a 3D program, which caused my PC to freeze. Now I see a red VGA indicator light and get error 90. Testing three GPUs didn’t fix the problem, and neither did Q-flash plus backup BIOS.
AFAIK error 90 on a Gigabyte motherboard relates to the boot device. Consider removing your operating system drive and starting the PC from a Linux USB stick to access the desktop. Note: I don’t have the codes for the X570, but the information matches older models.
Probably I'd begin by resetting the CMOS. If that fails, follow what @Captain Chaos suggested.