I've recently had a problem with my computer.For instance, everytime i've been turning on my computer, I hear the power going on, fans... but no beep. It happened just when I tried removing the heatsink with no luck(like I tried to pull down the notch but It slipped and it touched the Mobo slightly hard). Can Someone please tell me the problem! I'm getting really worried about my pc. Thanks to anyone who can help me!
make sure your heatsink is on properly, maybe it's no longer seated the way it should.
do what zero suggested, and if that doesn't work... disconnect everything except video card, 1 stick of ram, cpu/hsf... reset cmos, and try again. I had very similar problems with a recent build... turned out the first motherboard was bad, AND one of the memory sticks... lucky for me everything was still within return policy!
If that doesn't work, try your stick of RAM in a different slot, and try both sticks on at a time... if that doesn't work, then it's time to try all your hardware (ram/video card/cpu) in a known working system...