Hey RAY, -I would start with the cheap route by checking for loose cables or bent pins. But unfortunately, you might have a problem in your MAIN board. -DON'T take the batteries out with the power off. -Try to get to the BOOT menu -Turn pwr off -Press F-1 and F-5 while powering up, that will get you to the BMON (boot monitor menu) also--- what is the number code on the Main in the control box (0-7)