[Scott Douglas]

OK, here's what I've done to try to determine if it's pwr supply or HD that is bad.
I borrowed my cable for the monitor to my computer so I'd have a way of seeing something on screen.
That worked well when I subbed in a known good hard drive to her computer box. Only problem was it went to the 'recovery' section of the drive and was asking for a REALLY old password from I don't know how many computers ago.
I tried rebooting and tried to get around that by pressing f12 to get to the bios menu. The computer froze and then started acting the same way it did originally this morning. Pwr button lights, momentarily, then shuts off. I tried pwring on with the computer opened up and the fan makes an effort to spin when the pwr button is pushed but just rocks back to the original position when everything shuts down again.
Is this acting like it might be the pwr switch itself?
I think her HD is fried though because of what is going on. When I put it in my auxiliary HD case and power it on, it doesn't come up on file manager the way my other drives do.
Suggestions are welcome on how to test the power supply without killing myself, as well as testing the pwr button switch itself.