The outhole kicker, shooter diverter and gumball motor do nothing, even in solenoid test, and the game reports the Geneva switch. The coils fire if their drive side is grounded and a new power driver board makes no difference.

Outhole, shooter diverter and gumball motor all dead: CPU board chip at U4

Cause: These outputs all come from pin 9 of their driver connectors (J125, J127, J130), which share one data bit from the CPU board. A failed chip on the CPU board stopped that bit.

Checks

• Note whether all the dead outputs sit on the same pin number across the driver connectors.
• Reseat or replace the CPU to power driver ribbon cable first.
• Check whether lamp row 8 or column 8 is also missing.

Fix

• If the ribbon cable is good, the fault is on the CPU board. Here, replacing the socketed chip at U4 fixed it.

Systems

• WPC Fliptronics

Games

• Twilight Zone

Related tips

• "Country code must be specified" message
• Gumball diverter, popper and two bumpers dead in test: faulty CPU ribbon
• CPU board completely dead
• Dead CPU: the order to replace chips
• Dead CPU: check the reset and IRQ lines
• DMD dead though display and controller work in other games: CPU board fault
• Dead CPU: isolate it from the other boards
• Why coils stay off until the CPU boots

Source: Pinball Repair help group!! (Facebook group)