Not sure what else there is to do (right now).
Try removing the CMOS battery (on the motherboard) for about 20 minutes and then put it back in.
If that doesn't work, unplug all accessories except the keyboard and mouse, go into the computer again and unplug everything but replug it as soon as you unplug it.
(For example, unplug hard drive, then re-plug it. Unplug Video Card and then replug it)
Then try to boot computer.