I have the same problem but I think is more advanced in my case.
My laptop ( hp nx6110) totally blocks - no answer from the keyboard, mouse or anything else. The only solution is to turn it off from the button. I tried to repair it, I have reinstalled the windows, drivers, I have cleaned up the cooler. Is till have the problem on a fresh installed OS. It still blocks all the time.
Did anybody else experienced the same problems? Do you have any other ideas?
Waiting for your answer.