Quoted from mrsyfy:I have some issues with a Star Trek TNG pinball that I delivered. It was working fine or so I thought before it was delivered. After a day at its new location the DMD had line going down trough it. Now its just random dots all over the display and no sound. Pulled the boards and sent them off for repairs. Now after extensive work on the boards. Still having the same issues. All the voltage lights come on and the CPU lights are working normal. But still no sound and no display, the game will not even play. Used the manual to check every connector for proper installation. and all ribbon cables are in place. Going to try a new DMD next week. Anything else I should check for?
Carefully check all the ribbon cables to ensure they are on correctly - pin 1 oriented correctly on all ends, not shifted a pin. These can be very tricky to see and since you removed your boards, you should check them all.
Check all the fuses with a meter. There are 2 on the sound board and 2 on the DMD controller for starters.
If they are all good, as a troubleshooting step, remove the ribbon cable connector on the sound board and see of the DMD works. Reinstall the sound board connector then try removing the ribbon from the DMD controller and see if the sound works.
Matthews, NC
