I was trying to install an IDE hard drive using a IDE to SATA adapter, I connected everything but when I went to plug the molex cable to the hard drive, as soon as the pins touched it sparked and smoke came out as well as a strong burning smell. I immediately removed the power cord from the power supply. The PSU smelled like burning plastic on the inside.
I took my PC and tried it with a friend's PSU. It posted OK to the BIOS, and detected every component ok. There was one problem though, at first it rebooted itself a couple of times and I got the message
"Power supply surges detected during the previous power on.
Asus Anti-surge was triggered to protect system from unstable power supply unit!
Press F1 to Run Setup"
After that, the PC wouldn't turn on. I disconnected the PSU, waited 5 mins and tried again. This time it ran fine for 15min without rebooting (just in the BIOS).
I also tried it with my friend's hard drive, but as soon as the windows boot logo appeared, the PC rebooted. I believe this must be because my PC is entirely different from his and I would have to reinstall Windows)
Does any of this mean my motherboard or CPU are dead or failing? I must say I'm not sure of the reliability of my friend's PSU either, but it works fine on his PC so I don't know