my mate has a pc and he did some decorating moved it about a bit and then set it up again. he turned it on and the monitor gave its usual green light and the pc fan could be heard, but it did not boot or beep and the monitor went to stand by. without asking for advise he went out and spent £100 on a new monitor only to find the same results. when he asked me i said it was probably his graphics card but after replacing it with my card wich i know to be good, the same happened. I have told him that he has a mainboard or cpu failure. His pc is only 4 months old and still under warranty. just wondered what the experts thought.