I've installed remote battery packs (with wooden dowels) on all my Williams games, but can't seem to get it to work on my TSPP. I've tried two connection combinations and still get a "Open Door" message on restart. Batteries in the board holder work fine.

I've tried (+) in lower right holder with (-) in upper left, as well as (+) in upper right holder and (-) in lower left. In both I leave the middle holder empty. I have checked and have 4.5v running to the leads, but when I install in the game it won't hold the memory. I must be missing something.

Is the battery holder on these Sterns a different configuration than the Williams games?

Can someone show me a pic of how they have this type of remote holder installed in their Simpsons Pinball Party?

I'm not sure how to check the voltage there. I'm a newbie to solid state.

Not aware of nvram. How does it work, how do you install it, and how much do they cost and where do you buy them?

Same one for lotr too?

Thank you! Simple question with a simple answer. Works just like I'd hoped. Different than my Williams game, as you use the center and bottom. Bless you epotech!