I just bought an ASUS EB1036 desktop PC, which came with Windows 8.1 pre-installed.
Before downgrading to Windows 7, I changed an option in the UEFI BIOS from "Windows 8" to "Windows 7".
After rebooting (still with Windows 8 installed at this point), the computer did not output any video. I have tried multiple reboots but the problem persists. The monitor never wakes from standby. I've tried another monitor and the same thing happens.
Could this be related to the operating system option I changed in the UEFI BIOS? If so, how can I change this back if I am unable to view anything on the monitor in the first place?
In case this isn't clear enough: the main problem here is not that I can't get into the BIOS... it's that I can't see anything on my monitor. There is no video output.
Advice on how to access the BIOS is not helpful as I can't see anything on my screen in the first place.