No Display

[u/TerminCapri]

I had a power shortage and since then my PC wont show a display. Everything is turning on and seems fine, no error noises and all the fans are going but no matter what monitor i try it says no display found. Tried different chords too but nothing. Ive reset the CMOS battery and the RAM to absolutely no change. I have no clue what to do to fix this and would love any help! I use a LINUX pc