I have this 7yrs old PC. It was working fine untill last week. I was watching a movie suddenly my screen turned black. No audio, no visual, nothing. I thought cpu turned off but it was still running. I restarted it then it worked fine. After some time same thing happened. I thought there might be some loose connection in cables so I disconnected everything. I cleaned it and put it on. It was working fine for a while and then the same thing happened again. I thought there might be something wrong with my VGA cable so I bought new one and replaced it but the problem still persist. I cleaned RAM slots and checked everything inside the CPU. Everything seems fine. I updated my display driver too. Nothing worked. It goes off randomly. Sometimes it goes off within few minutes. Sometimes it works fine for hours. I noticed something whenever I play any video in VLC or any media player it goes blank within 2 to 3mins. This doesn't happen when I watch videos in YouTube or any other websites. It happens only when I watch videos in media players. I have attached a picture containing basic information about my PC.