Looks like I am shopping this for a friend and troubleshooting a few things...Have never had one so I will be blind on a few things...here are the few issues it has. Any help would be great.

1) Credit button goes to 40 which looks normal in manual. When you press a game it goes to 28. Normal? Is there a free play setting?
2) When you are playing the game will randomly award a free game or sometimes the score looks like it jumps around. Any ideas? I think I even the knocker when it awards a game randomly

3) On the squawk and talk board the green led light comes off and on and I found that touching the connector at the bottom causes it. Guessing the led is power and I should look at reflowing pin headers or checking connector?

Anything else I should check for would be helpful

Thx!

Original boards

so guessing I should play the game and see when this sudden credit appears...

Anyone have any nice led pics...Ill prob just go warm white and maybe a little amber if it looks good.