Score displays on my Gottlieb Joker Poker solid state machine are acting up. When I turn on the machine each display for each of the 4 players show all 1's across the 6 positions and the current high score of 929,801 (1st photo).
When credit button pushed, each displays shows 1's straight across all 6 positions (2nd photo)
Any ideas of what to check first or what the cause could be? I am OK with fixing EMs but solid state machines are more of a mystery to me.