I have no video out put...except when i unplug my video cable my monitor says check signal cable. I've done alot of reading on this and still everything ive tried I get nothing. Completely rebuilt the machine and nothing. Tried to boot with just 1 stick of good ram, video card and processor I get na'da. Took it to geek squad at best buy they told me it was the motherboard. So I replaced that, the processor and the video card still nothing. And yes the monitor is good im using it right now on a different computer. I even tried a different power supply and got the same results. It was working fine before I had it shipped back here from over seas. I have also reset the bios by pulling out the battery. anyone know what could possibly be causing this?