What could be the problem?

QcAk

Honorable
Dec 27, 2013
24
0
10,510
Hey guys, I have this computer and whenever I hit the power button nothing happens. The green light on the back lights up but that's it! What could be the problem? Thanks.
 

QcAk

Honorable
Dec 27, 2013
24
0
10,510
Yes I actually have a new PSU that I can replace it with if that's the problem. Any tips on installing the new PSU? Is it easy? All help is appreciated!