Just got my boards back from rebuilding and have most of the bugs chased out of the game, for the most part it plays fine. The sound went out shortly after but I think I have it figured out. I had nvram installed on the board while it was out and it stores credits but the high score to date always displays 50000. Is there a game adjustment or setting I'm missing that could fix this before bothering the guy who rebuilt the mpu? I have a high degree of confidence that the work is fine, done by a very well regarded shop and I hate to pester him with stupid questions when I can pester this board with stupid questions instead..

I haven't tried manually setting high scores through game afjustments, only through gameplay. Audit information seems off, like 50,xxx total minutes in play, 50,xxx balls played...Yada yada. Boots to attract mode and plays fine, though it does award ten credits/coin on one coin slot even though it's set to one. Could I be looking at a switch matrix issue surrounding the high score reset switch?

I will run it through switch test and try changing default high score. As it it it will display the score of the last game and 50000 alternating. I'm beginning to think I have a switch matrix issue surrounding the high score reset switch, roll tilt is in the same column and inop

Display test looked normal except bottom row is out on all displays, and #4 is broken.

Shouldn't there be diodes here? I thought every switch had a diode, lack thereof causing reading errors? Are the diodes for the door switches located elsewhere?

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Will try this, thanks.

Tries reset to factory defaults, no luck. Still shows 50k as high score. Credits are stored. Haven't tried changing default high score in game controls yet.

I ran up a score past 50k and it still shoshows 50k as high score. I think the nvram chip is working though since it stores credits. If the high score reset switch is sticking/shorted, or if maybe there's a bad diode in the switch matrix affecting it would that be a possible cause? High score reset button is column 1 row 8 it looks like. I see no diode on that button but could another one affect it?

I'll run the switch self test and check for stuck switches tonight and report back.

I tried resetting factory default settings again, and I must have screwed it up last time I tried. It worked this time, curing a couple oroblems. High score works, coin slot 1 trips one credit instead of ten, another bug fixed, thanks!

Sweet!, match works now too! Must have had a bunch of junk data in that ram.