Thanks for the advice. Very helpful. It was a connector issue. As once swapped, they all worked. Swapped them back and now they work. The more I tinker or find faults, the more I realise the connectors seem to cause many erradicate or impromptu faults.
Thanks again
The 3th digit on 1st player score and the 4th digit on 3rd player score do not light up. Is it a connecotr problem or to do with display unit? Any ideas on how to fix it or what to look for?
With the game switched off, you can switch the displays around to see if the fault follows the displays. I think it is a display issue, but swapping them will confirm.
