Hi All, 
my displays have arrived & i have replaced the dead 4 player display. Good news is player 2 & 4 works bad news is player 1 & 3 are missing 3rd digit. I have wriggled the wires & there is no change. How can i check wiring to find out which wires are the problem? As i know the displays are both working.

Does anyone have any old system 3 cabling that they want to sell?

Hoping someone can help  Cheers Paul