OK . . . left flipper quit in middle of game. Just died, no response. Checked flipper function in test mode and works fine both low power hold and high power flip.
Think I narrowed it down to the opto board BUT I ordered the A-20207-P from Marco and here is what happens:
I pulled the old opto, replaced it with new, plugged in the connector to the board, closed the coin door and the left flipper moved up to the "low power hold" position.
Don't know much but I'm sure that is not expected behavior . . . there are two interlock switches on the Flinstones coin door and the top switch is causing the flipper behavior.
I've attached pics of the new opto and the old one for reference - did I just order the wrong one???
Of note also . . . when I replaced the new opto with the old - voila! The left flipper worked for about 2 minutes . . . then dead again.