Two weeks ago a guy brought in his grandson's computer. The machine kept shutting down at random. We thought that his GeForce 7900 graphics card might be maxing out the 300W PSU, so I put a new one in and it seemed to work fine.
Last week the guy brought the comp back in, said it was doing the same thing. Now, all my monitors are VGA monitors, so I had to use a DVI converter because all the ports on his 7900 card are DVI. I don't *think* that should have anything to do with the problem that came up, because it worked fine when the computer was in before. Now I can't even get the original card to give any video. The board has an onboard video, so I took out the card and plugged it in and it seemed to work fine.
I put a different PCI-e card in, and it gave video through the BIOS and Windows Loading screen, but when it came to Windows the monitor gave an input not supported error. Same thing in Safe Mode. Same thing with a PCI video card, and now the onboard video is giving the same error. My thought would be that the monitor went kaput, except I got the same error on a different monitor.
The computer is an HP Pavilion a1483w with an Asus ABN-LA mobo. It has an AMD Athlon chip and 2 GB DDR 400 RAM. I've tried replacing the RAM, and taking out the modem, but that hasn't helped anything. Does this model computer have a known problem like this??? Does ANYONE have ANY idea whats going on??? I really need to get this comp back to the owner since he's had it in already...