So basically here is the deal.. I'm upgrading my compaq presario desktop with a new processor.. Single-Dual core.. I put the new processor in carefully.. booted it up had really no problems.. Me being in the mood I was decided to take out everything clean it all out with compressed air and put it back together.. When I boot up now it gets power for a second fans spin, there is a single beep and everything shuts off.. the computer stays with the green LED light like there is power but nothing happens.. I've now put my old CPU back in with no problems everything runs fine.. Are there any ideas? I will post my specs if you think it will help.. I'd really like any suggestions as I'm sick of a single core... BAHHH help!