I put together a computer this afternoon from spare parts and for a while it worked fine. well, i decided to reformat the HD and install WinXP....as the HD was formatting my buddy looked at the computer and noticed that i did not plug in the CPU fan. i pulled out the power cable from the back of the computer to shut it down. i then removed the mouse, keyboard, and other things plugged in the back of the computer, plugged in the CPU fan, then put the power cord back in. the computer was just starting to power up when i saw that i had not connected the mouse and keyboard so i pulled the power cable back out. all this happened in the span of a few seconds. now the computer will not turn on....a green light on the front of the computer stays lit. nothing happens when i push the power button. it is not the HD light, but maybe a power light? i took the entire computer apart and put it all back together. i reseated all the comonents - even teh cup. my buddy thinks i killed the processor (a celeron 2.4). i think i killed the motherboard (MSI - don't recall the model num). how can i find out what is wrong? i do not have another mobo or processor i can trouble shoot with. any help/suggestions would be greatly appreciated. thanks in advance!