Well my friend bought my old compaq. And the power supply went and so i gave him an old powmax psu like 350w and it worked fine. so we left and came back and it froze so we restarted it and it booted up but nothing showed up on the monitor. so we try a diff mon and it still wouldn't show up then a used an old voodoo card and no avail. does anyone know what could be wrong now? thnx