SO i recently got my pc which my uncle repaired. The problem was that the PSU was busted so he replaced it and connected some loose wires inside. Now I was playing Limbo when the monitor suddenly turned black. The light thing would blink (the one that signals that the pc is plugged in) but the images would not return. I'd have to restart and switch it to the motherboard to do some homework. Now this wasn't the 1st time it happened, this happened before the psu even broke. It fixes itself randomly at times though. Yesterday the monitor turned black. I turned it off for an hour and when I turned it back on it was working again. Now it turned black but I still had to plug it into the motherboard to get working because the screen remained black after 1 hour.

So what do you guys think? Do I need to buy a new one?

Also the computer is very dusty inside. Uncleaned for 2 years because I am really scared that I may break parts inside when I attempt to clean it

Specs CPU: Dual Core E6600 GPU: HD 5670 Ram: 2GB Motherboard: ASUS P5KPL-AM EPU