Every solenoid is dead and the fuses test fine.

No coils work at all, fuses are good

Cause: The coin-door interlock switch has failed or is not pushed in far enough when the door shuts. It breaks coil power from the transformer before it reaches the driver board.

Checks

• Look at the driver board solenoid power LEDs: they stay dark when the interlock is open.
• Check the switch closes fully with the door shut, and test it for continuity.

Fix

• Adjust or replace the coin-door interlock switch.

Systems

• WPC Fliptronics
• WPC DCS
• WPC-Security (WPC-S)
• WPC-95

Related tips

• A coil does nothing although its fuse is good
• Firing each coil from the WPC solenoid test
• A solenoid will not fire in the solenoid test
• One coil does nothing in the solenoid test
• Press Start during the solenoid test for a coil's wiring details
• Coil-not-working checklist
• WPC solenoid driver groups
• One coil will not fire

Source: Repairing Williams/Bally WPC Pinball Games from 1990 to 1999, Part Two, Clay Harrell (pinrepair.com)