Hi all. I have built my own pc(put the parts together) and I just finished yesterday. Everything was working fine, except that there was some blue screen error about the harddrive, but I could still get into the bios. It said to check the harddrive and hdd controllers, etc. Then, I thought the cause might be the power cable or the ide cable-slave instead of master. So, I tried to pull out the power cable connecting the psu to the hdd, and it was stuck. When I tried to pull it out, it came out, but my hand accidentally hit the cpu hsf and the pc shut off. Now, the computer doesn't turn on and only the led light on the fan blinks and nothing else happens. The psu works fine because I put it in another pc and it works. Also, when the psu is plugged into the outlet, there's a green standby light on the motherboard. My question is-is the cpu dead or what else is going on? I know the cpu didn't overheat, because when I went into bios at first, the temp was 45-50C. BTW, this is my new pc: p4 550 3.4 LGA775(prescott) D915PBL mobo, x700(PCIe) card, corsair value select 2*512megs(DDR2), ocz powerstream 520w psu, thermalright xp-120 hsf with arctic silver 5. I would appreciate any help. Thx.