Iv dealt with this for a year now and its really starting to do my head in, on most games the screen goes black for a few seconds then returns to normal and it happens on youtube rarely.
iv stress tested my gpu which is a nvidia geforce 9600GS and it hits 80 c after 10 minutes which i think is reasonable so i dont think its that.
iv been trying to run crusader kings II and after one minute the screen goes to no signal but the audio continues and i have to restart, also when switching the computer on i have to press the power button ALOT! and all i can hear is it trying to start but failing within a second.
i should also put that my 9600gs was overheating to nearly 100 c but i cleaned the dust out and its went back to reasonable temps
sorry for the big essay but its best to post all the details i can think of so someone can help me