Solved: computer wires loose

i know this is a rather difficult topic to deal with when not being there but my buddy cleaned the dust out of his computer and now a wire is unplugged, problem: he turns it on and it goes to a black screen, no words or anything just a black screen however you can tell its giving feed because it goes from black to a lit up grey. any suggestions are good.

 

turns out my friends monitor is fried. cause i plugged in mine and it works.

Solved