Make sure there's not an bad or cracked bulb socket that's shorting out the socket, which in turn shorts out that GI. string. I had a bulb blow, then the metal shorted out the whole left side of the pin. Best of luck~SpOoKy

Probably the relay board. Screwed into the back of the insert door behind the back glass. It's 25.00 for a new one. You can swap the one under the play field to check and see if that fixes it.

Have the same issue but the right side. One of the connectors on the bottom of the main board.
Wiggle all till you seen them come on.