After a restoration where everything was taken apart and put back together, every solenoid and flasher locks on at power-up.
Every coil and flasher locks on after reassembly: aux driver ribbon cable reversed
Cause: The ribbon cable to the auxiliary power driver board had been plugged in the wrong way round.
Checks
- Switch off at once and check every ribbon cable's orientation and position, including the one to the auxiliary driver board, not just the CPU-to-driver cable.
- A ribbon cable shifted by one column between the CPU and the driver board can cause the same thing.
Fix
- Plug the reversed ribbon cable in the right way round.
Systems
Games
Related tips
- All flippers fire at power-up and blow the 50 V fuse: aux board ribbon upside down
- After playfield work: optos, crane and Deadworld dead, trough dumps balls (J116)
- DMD shows a few dots and a coil fuse blows after reseating boards: ribbon off one row
- Reseat the ribbon cables before chasing odd behavior
- GI string dead with a scorched connector
- Resets from worn power connectors between transformer, driver and CPU boards
- GI connectors on the driver board
- Repair a burnt GI connector on the driver board
Source: Pinball Repair help group!! (Facebook group)