PC won't boot - help?

[jesusfr3ak4evr]

My roommate for college brought his pc and it won't boot or show anything on the screen. It does not beep when I turn it on (yes, the speaker wires from the case are in the motherboard), but everything is powered on. Everything seems to work - I'm thinking possibly the CPU is the problem? Or maybe there is something else one of you can think of that I'm missing? Help would be appreciated. Thanks.

 

[Chernobyl1]

Take it apart and put back together.
It is most likely a bad connection somewhere.

 

[metallicafan]

eliminate all parts that are non essential for boot up such as optical drives and such. Try just using one stick of RAM or putting your RAM in different slots.

 

[TheMostWantedPolishTwin]

I'd start from clearing cmos and checking all connections...