Last Saturday, my computer died. I mean, I would push the power button, and nothing happened. I figured that it was either a problem with the power supply or the motherboard, but which was it? I took the power supply into the store that has squads of geeks, and they tested it, and told me that the power supply was working properly.
I ordered a new motherboard ($200) from Newegg. It came in on Thursday, I tested the system, and nothing. I wound up going to the same store on Friday and bought a new power supply. I am now back up. Thanks geeks, for the extra $200 expense.
At least my computer is back up.