Several insert lamps stay lit all the time. Swapping the lamp driver board makes no difference, but wiggling the wires at one of its connectors changes which lamps are on.
Several insert lamps stuck on after work on the game: corroded lamp board plug
Cause: The pins in the top left connector of the lamp driver board were corroded and one was broken.
Checks
- With the game on, gently wiggle each lamp board connector and watch the stuck lamps.
- Inspect the pins in any connector that reacts.
Fix
- Repin that connector with new pins (and a new housing if needed), and check the board header.
Systems
Games
Related tips
- Bottom spinner insert always lit: it is a GI lamp, not a stuck one
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- Lamp driver board layout: SCRs, decoders and connectors
- Lamp driver board: which SCR drives which connector pin
- Auxiliary lamp driver boards: SCR to connector pin
- Rollover lamp stuck on after a new SCR: schematic labels swapped
Source: Pinball Repair help group!! (Facebook group)