Hi All: I was recently asked to reinstall XP onto a friends pc, after someone completely wiped it, great, I thought an easy job. How wrong, I was!!! When I initially got it, it wouldn't turn on at all so I opened the case and I noticed the CPU fan was doing a half turn and the hdd and drive lights were turning on and then off, after a second, classic signs of an electrical short but I couldn't find any cause of that. Next thing, I tried was to remove the 12 volt CPU power plug and the fan started so I thought it was that was causing the problem, so I soldered a replacement plug on, the system powered up, success I thought, NOT. I left it off overnight and went back to it in the morning, same problem as initially again so I thought that the system might be drawing more power than the 350w PSU could provide with connected: 1 motherboard 1 floppy drive 3 drives 1 hdd So I disconnected the 2 older drives and floppy drive and it booted again, left it 30 minutes before testing again, can you guess what happened? Back to the initial problem. So purely by accident, I was plugging the Power cord into the PSU and a heard a BLUNK sound from the PSU and when I pressed the power button, it turned on and ever since then with a combination of wiggling the power cord and power switch at the back of the PSU, I can get it turn on. I also removed the suspect PSU from the system and connected it to my system which was working and the same thing happened as initially so I don't think its anything to do with the Motherboard. So I think whatever, blanked the hdd, has also caused a short in the PSU and I've recommended to my friend to get a new one, as I cannot honestly give it back in this state. Am I correct in my diagnosis?