After fitting replacement LED score displays, two player displays show only six of their seven digits and the other two player displays show nothing but zeros.
LE: new LED score displays miss a digit or show zeros: pins 2 and 11
Cause: The factory harness routes the latch wires for the player 2 and player 4 displays through pins 2 and 11 of the other display connectors. Original displays leave those pins unused, so it never mattered, but the replacement displays use them.
Checks
- Try another set of displays; if they misbehave the same way, the harness is the problem, not the displays.
- Look at pins 2 and 11 on the credit, player 1 and player 3 display connectors for wires that continue on to the player 2 and 4 displays.
Fix
- Pop those pins out of the credit, player 1 and player 3 display connector housings (five wires in this game) so the new displays no longer see them, and insulate the loose pins. The wires still carry on to the player 2 and 4 displays.
The display circuit runs at high voltage. Turn the game off before working on display connectors.
Systems
Games
Related tips
- One digit missing on a score display
- Seven-digit and six-digit displays
- Only even-numbered score displays show numbers
- Same digit missing or stuck on every display
- Garbled displays: broken pin in the MPU display connector
- One score display dark: poor contact at MPU J1 pin 20
- Four flashes only: U11 PIA, R134 or a bad display
- All digits on all displays show 2s or 7s
Source: Pinball Repair help group!! (Facebook group)