Question Can't enter/reset BIOS, black screen after selecting EFI boot ?

Mar 17, 2022
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I have an MSI b75ma-p45 motherboard, and I changed the boot mode from UEFI to EFI (help said something about EFI roms)
Didn't know what it was and was stupid enough to select it to see if it would solve my Windows startup issue (Windows was booting into startup repair).
After this, the machine powers on into a black screen with fans running, no option to enter BIOS or anything else is displayed.
I tried an old PS2 keyboard, but this won't trigger the bios either.
I removed the battery for a whole night, clicked the power button countless times, removed 3 out of 4 RAM and read in the manual to use a jumper and clear the CMOS.

I put in a new battery, fired it up, but still no change.
How do I get back into the BIOS?

Motherboard photos/jumper location:

 
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