Hello to all fellow techers. A friend referred me to this website to get help on a current situation I have with my PC, and I am hoping you guys can help me with the problem. Recently I took apart my HP Media Center m7658n Desktop so I can put it in a new ATX case. Meaning I took out the motherboard, CD Drive, HDD, etc. and placed them in the new Case. Everything except the power supply. I am certain that everything is installed correctly like it was in it's old HP case. So everything is plugged in and I turn on the switch to the power supply: When the switch on the back of the power supply is 115V, my pc boots up, everything is running, but I get the following error on my monitor: ERROR: system fan failed! Service PC to prevent damage Press F2 to continue When I press F2, nothing happens. So when the switch on the power supply is 230V, something different happens. My custom lighting and fans all run when I turn on the switch to the power supply. However, the monitor doesn't read the PC at all and the heatsink fan doesn't run, nor does the CD Drive work when I press the open button. Any ideas what's going on?