Response from Jonathan: Henry,

This is a very strange issue. Since the pots are reading correctly on the setup screen, you would think they would work on the title screen and in gameplay mode. At this point, we might start assuming that it’s an issue with the board. Unfortunately we do not know enough about the G-Loc boardset to identify where the problem is with your game. It would probably be worth investing in a manual for the game (if you don’t have one already) to help you pinpoint where the problem might reside. You might also try contacting Ken at irepairsega.com to see if he has an idea on what might cause this particular issue.

Hope that helps. Thank you for your question and good luck with your repair.