Friend's computer that I built about a year ago randomly stopped responding to his monitor. The computer turns on, lights turn on, everything works basically, doesnt really respond processor wise but it doesn't seem like the processor. The lights blink, nothing happens. One of my friends thinks processor, one of my friends things PSU. We took it to Best Buy and they said motherboard so we ordered a new motherboard, put it back together and same thing. I'm uploading a video to youtube and will link it once its there of what is happening. We also tried taking out the video card and using on board so it is not the video card.