Ok, I want you to do several things.... As far as I know, your pc worked fine up until you took the cpu out and tried the swap... If this is correct there should be no problems unless you either mishandled the cpu... What did you do with it after you removed it? You just can't set it down on anything or put it anywhere. I mean you can and get away with it but, you run the risk of a static attack which will fry it. I am trying to find some info on your mobo... I have several images of what might be yours I will try to insert one and tell me if it is yours. You have a socket 462 as far as I can tell. even though these are out of date I like them and I running one now. If it is fried I will give you one... I have a whole @*%$#@ load of them... First off, make sure it is seated right. Second off NEVER insert a cpu without having the heatsink on it and the fan hooked up. An amd will fry in a sec! You said everything starts and runs...OK, tyr taking the ram out and then booting up. If you get no beeps, it is a sign that your toasted... Tell me what your cpu says on it and I will send you one free.....