Certainly good news!

So scores DO register when a switch is closed - the only issue is that Player 1 scores are missing digits??

We can certainly fix that.

But... The outputs on the PIA on driver are not correct, unless you had some switches that were closed.
IF this is an issue it will become evident later down the track as you iron out any other niggles that may be present,

Let me recap.... ALL scores work correctly APART from player 1?



Check the solder joints on this and resolder them all, its common for these to crack and lose signals,

Failing that, the only ic  that is for Play1 is IC13, its the only IC that is isolated to Play 1,

But id be looking at the soldering first