Maxxyz Compact black screen

Needed to access the BIOS of my compact, but the BIOS had a password locked on it. Didn’t know what the password was, so I removed and reinstalled the CMOS battery to reset it. Now, I get absolutely nothing. Screen is black, external screen gets no signal, Keyboards don’t read any life. I’m afraid I bricked the Motherboard, but that makes absolutely no sense to me, being an old small battery that would’ve died one day. I just need the Compact to boot now. Help?

This is the motherboard, maybe the documentation shows a reset process:

This is a bios support document I found.
Maxxyz Compact Cerebrum CMOS Settings.pdf (60.6 KB)

I think I found it… thank you so much Matthias! I’ll keep you posted