I'm asking for a friend, because I don't know how to help him with this problem. I have had the same problem, but he insists his gpu isn't dead. He told me that the the monitor shut off and then he turned his pc off, and after that happened he turned it back on and then it was working normally. Then He told me that he turned his pc off again and opened the pc up to see what caused it and now it won't display at all but the computer still turns on it just doesn't display at all. He also told me that his memory usage was at 100% so he took out his memory and put back in and it still won't turn on.