Unplug the machine and reset the cmos jumper. If it comes back up hit delete to enter the bios, but tell it to exit without saving the changes andreboot. If it reboots fine go back in and immediately hit F10 to save changes and exit without actually changing anything and lemme know if it hangs then. It you CANNOT get it to boot at all after resetting it try unplugging the power cord long enough to let the light go off on the motherboard, plug it in and try again. If that doesn't work unplug the cord and the atx connector from the board for about five minutes and then try it again. If none of this works he MAY have damaged the core.
Tiribulus
