Hi, About a month ago my system froze and became unresponcive. I tryed al the normal tricks to Shutdown an crashed PC and was forced in the end to switch off the power suply. When I went to turn it back on. It did not POST, it just sat there spinning fans and HDDs at me. I then tryed shuting it down by holding the power button, on the front of the case, for about 30 seconds. Nothing happened and i was again forced to switch it of at the power suply. SPECS: ASUS M3A32-MVP Delux AMD Phenom 9850 Corsair XMS2-8500 2048mb 1066MHz (x2) Radeon HD 4670 512mb GDDR3 (HIS IceQ) Corsair HX620W Modular PSU 2 Sata HDD 280gb, 500gb IDE DVD-ROM/Burner D-Link DWA-510 Wireless Network Adapter I have methodicaly gone through and removed all pieces one at a time and tryed to start the computer with each item removed. The resault was alwas the same, I had to switch off the PSU to shut down. I tryed both sticks of RAM individulay also to no resaut. The first sign of a normal boot was when I had just the PSU pluged in to the Motherboard. In that instance I could shut it down using the Power Button on the front of the Case. I have taken the Motherboard back to ASUS to be looked at and I shiped off the CPU to be tested also. Both came back said to be working exactly as they should be. I still have to test the ram on a friends computer along with my Cards and HDDs. But I realy do not think this will prove anything except that thye are in pperficet working order. So I guess my question is what else can I do to figure out what is wrong with my PC. Thank you for taking the time to help.