The game boots, the display and sound work, but no solenoids, flashers, controlled lamps or GI work, in game or in test. Fuses and voltages on the driver board are fine.
No coils, lamps, GI or flashers but display and sound work: check blanking
Cause: The blanking signal from the CPU board is not reaching the driver board circuits; here a trace on the power driver board was damaged.
Checks
- Reseat the CPU to power driver ribbon cable.
- Trace the blanking signal from the ribbon connector J113 on the power driver board to U1 with a continuity meter.
Fix
- Repair the broken trace; in this case a jumper wire from J113 pin 32 to U1 pin 1 on the power driver board restored everything.
Systems
Games
Related tips
- WPC driver board: lamps, GI and coils all dead, CPU fine: broken blanking trace
- How a WPC coil, flasher or lamp driver chain works
- Where the WPC coil and lamp drivers sit
- Supercharger diverter dead even in test: open TIP102 at Q81 that tested good
- A coil or flasher energizes as soon as the game is turned on
- Testing a coil diode on the driver board
- Resets during the Powerball battle: reseat J101 and J115 on the power driver
- 20-second test for shorted coil driver transistors
Source: Pinball Repair help group!! (Facebook group)