Computer doesn't detect monitor/keyboard

[Slamz]

That's a weird one. Motherboard dying, maybe? Or power supply. Kinda has that undervoltage vibe where something is wonky with the power and things just misbehave in strange ways. I dunno how to diagnose something like that, though. If there's any optional hardware you can temporarily eliminate (including maybe removing some RAM and swapping out which are removed), maybe try that too. Just thinking there could be some particular component on the fritz that's making the system electrically unstable. Had something like that one time where a network card had developed a short or something. Removed it and everything was fine.