If the heatsink is disconnected, you need to understand if its broken or needs to be re-attached. If that can'tr be done, get another HSF(heatsink&fan setup) that's rated for your cpu or better. The cost isn't that great and do that before you try to power-ON again. Repeated power tries may fry it, so get one. I offer this website but any decent one should offer similar:
hi, i had a compaq presario sr1000 cpu which spoilt recently and i need suggestions on what is the cause of its breakdown and advice on how to repair it.
few days ago, my cpu made a loud weird noise and broke down. everytime i tried to on the cpu, it will only run for a few seconds and dies again. the fans seem normal, but the heatsink is no longer joined with the metal chip piece. so i am trying to figure out wat is the problem and try to solve it.
could it be overheating? or any other problems? which part shld i change?