Maybe I'm missing something here. I recently picked up a Konami XMen 4 Player PCB from another user on the site and it seems settings in the test menu aren't saving when i power cycle the cab.
Initially when I installed the board into the cab and turned it on the attract sounds were crazy loud. Obviously theres no volume knob in the board (as per the manual), so you are required to flick the test switch and make game and coin adjustments there.
Sound level, attract mode noises, players per credit, are all things you can adjust, then you need to select "Save and Exit" for it to take the changes. I've done that, and the settings hold after exiting the test menu, but if I power cycle the cab everything I changed goes back to the way it was.
Everything in the boot self test comes up as ok, so im not sure whats going on.
I can't see anything on here that looks like a battery, and there's definitely no coin cell or cell holder on the PCB. I cant seem to find any reference to this problem anywhere else when i search. What am I missing here?