Do you get all six flashes to the MPU?
Did you run the diagnostic tests?
Try disconnecting one of the displays and see if the other one works. If not, reverse and try again.
The MPU must fully boot for you to get anything on the displays. If it does, you should get *something* on the display even if it's garbage. If you get nothing, it's possible you have a bad cable and the displays are not getting any power (unlikely). It's rare you get absolutely nothing on the displays when the machine is fully booted.
Thanks for the response.
Yes I did get all six flashes on the MPU . It is a brand new MPU. All the lamps and solenoids work in diagnostics. I haven't checked the roll over switches in diagnostics mostly because I can't see the displays. I have swapped out the boards on the ribbon cable with no avail. I will check the continuity on the ribbon cable today. The game was picked up outside of someones house and the game was frozen.. not sure if this would affect the LED's on the display.