Hmm...you could try swapping the ram and then the processor and see if any of thoseare the culprit.
Also, what kind of processor and motherboard does he have?
More detail would help alot.
The green light shows that power is coming to the motherboard, but
nothing is being done with the power. When it is turned on, can you hear
the drive(s) spinning and the fans spinning?
Have you ensured that the connections are tight and that everything is seated properly? BTW...the case has nothing to do with powering your pc...unless the on/off
switch is faulty.
Hope this helps...post back with more details.
Technical Support Manager