I just got this computer (not from a store) and I noticed that the damn thing wouldn't turn on. so the first thing I thought was that the power supply was shorted I checked for the light on the back of the power supply to kick on when I plugged the cord into it didn't get a thing.
But later on I took out the power supply to try others but before I tried another i plugged it in normally without it hooked up to any components, the green light on the back seemed to turn on. The minute I noticed that I put the power supply back in the computer than I plugged the cord in than the green light kicked on thinking it might work this time.
The minute I hit the power button I was watching the light on the back of the power supply it kicked off so from there I'm either thinking its still a power supply problem or maybe everything else on board is either fried or its the mobo. I'm posting a link to the info on this computer for everyone else to make this more convenient for those needing to read up about it.