My ST:TNG won't go into the Diagnostics menu anymore when I open the coin door and press the
Service button on the 4 button panel. The only thing I have done just before this happened is pull the apron to fix a intermittent wire to the kickback coil. I used the solenoid test before and after to verify I fixed that broken coil lug wire.
The game will power on, start fine and play a game. I get the message on the DMD when I open the coin door but pressing the service button does nothing. I don't see any wires that have come loose on that switch but haven't pulled it out of the mounting plate yet to take a closer look.