Desktop computer - Vista Home Premium, Quad core Q6600, 4 Gb RAM, NVidia 9500GT. The system began to lock up and lose graphics. I have cleaned the interior removing just over a year's dust from the CPU, PSU and graphics fans. The system will boot ok and run for approx 45 mins before freezing, it will run ok after a restart for a while then freezes again. After another restart it then doesn't produce any output to the monitor. The monitor is ok (works fine with another PC) and the cables are ok. Is it possible that the graphics card is overheating/has been overheated and that when running for a while it is failing? How can I check the temp of the graphics card? Don't have a spare card to swop with.
I'm going to have to abandon this one for the time being. I cannot get access to it and cannot get safe mode (no display to see if I got there). I'm going to take it in and have the PSU and graphics card checked (I don't have spares at home). I think the graphics card has failed/is failing.