Lodi, CA
Check the voltage first. This will prevent you from frustration if the battery holder is not the issue (blocking diode, etc).
Then change to a remote battery pack
(Topic ID: 225050)
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Pinwiki describes this error ominously "The "Adjust Failure" message seen in the picture at left occurs when the game software can't make sense of the information contained in the battery backed RAM at U25."
I think it might be time to consider changing U25
Check the information here:
https://www.pinwiki.com/wiki/index.php?title=Williams_System_9_-_11#System_11_.22Adjust_Failure.22_and_.22Factory_Setting.22
Quoted from topkat:Thanks. I wasn’t sure if there was another spot in the board I should check for voltage. But I will switch out a u25
You can check the battery voltage on pin 24. If it gets there and you still have the problem then that's the next step. If it's not socketed be careful. Those traces are tiny
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