I had a Strange Science that I upgraded with NVRAM & think I had an issue with it not coining up after the install. Found some instructions online on doing the factory reset & worked for that machine. I just assumed it was the same for other Bally 6803 games, but looks like instructions may differ per game. I'll have to just note to consult the manual on resetting to factory defaults, setting sound options, FREEPLAY, etc. Shame if it can't be something consistent and easy.

Thanks for the review & the notes! Glad to hear you got the nvram working! Getting rid of the batteries and not having to worry about what's lurking behind the backglass each year is one of those piece-of-mind mods that's worth every penny!

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http://www.pinitech.com - "Pinball Inspired Technology"
NVRAM, Bally/Stern LED Displays & Mods for pinball machines

Yep I couldn't remember exactly all the symptoms but it's definitely wonky until you reset to factory defaults & then make changes to other settings per the manual. Really with the NVRAM installs, in all cases it's just easier to do a Factory Reset on games that have the option or plan on zero'ing out each adjustment/setting on games that don't.

Even the same manufacturer & same era games could be a bit different in what you need to reset or zero out, so consulting the manual on how to set defaults is best. A slight inconvenience when installing NVRAM, but once you make the changes it's good for a long while