(Topic ID: 259218)

(Stingray) All Displays Fading Out..

By mystic-

4 years ago


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  • 26 posts
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  • Latest reply 4 years ago by mystic-
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#25 4 years ago
Quoted from PinballManiac40:

Testing one by one is a good thing to do. I read in the past sometimes a MPU can have an issue on players 2 and 4 and 1 and 3 could be ok. I never watched those threads to see what it turned out to be.

Think that player 2&4 and player 1&3 stuff would apply to earlier Williams games (Sys3-7). The wire harness to the displays on Classic Bally/Stern games is done in a daisy-chain fashion, usually starting at Player 1. If all the displays are out, it's usually something at the MPU or a signal dropped going to the Player 1 display. Best to disconnect all the displays and test each one individually at the Player 1 position and get that position working. That isolates any issues on the other displays from affecting all the other positions.

Common issues on these displays are solder joints at the .156 headers and connector / wire harness issues. You'll drive yourself nuts if you don't repair any cold/cracked solder joints on the displays, so something to check if you get to the point it's just individual displays acting up. This shouldn't take out all the displays though so it shouldn't be your main issue.

Next big point of failure is connectors and this WILL affect all displays. If you haven't repinned the J1 connector on the MPU, that might be the problem (esp considering it looks like your MPU suffered some battery damage and the vapors can over time destroy the terminals in the connectors). Try wiggling J1 to see if that makes the displays come on or disappear. There's a chance there's a fault with signals from the MPU, but it's usually not intermittent with with displays sometimes working and sometimes not. At this point I'd be focusing on checking J1 at the MPU and isolating things by only testing displays at the Player 1 position (with all other displays disconnected).

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