I have a compaq sr1650 nx amd athum 64 3500+. Currently running win xp media edition. It was filthy inside so i was cleaning it and the cpu and fan came loose so i removed it to continue cleaning. when i put it back i used the correct paste or grease needed to reattach the fan to the cpu. I installed it and when i turn it on the fan doesnt stop running and i have no monitor. what could have happened? cant see any error codes because the monitor doesnt come up. ive checked to be sure nothing is loose.