None of the coils fire.

No 50 V coils work

Cause: Fuse F112 is blown or bridge BR3 has failed. A shorted BR3 can also take the main line fuse, sometimes only once the coin door is closed.

Checks

• Check F112 and the line fuse.
• Test BR3.

Fix

• Replace BR3 if shorted, then fuses with the correct rating.

Line voltage is present in the power box and at the transformer whenever the game is plugged in; unplug it before working there.

Systems

• WPC Alpha-Numeric
• WPC Dot Matrix
• WPC Fliptronics
• WPC DCS
• WPC-Security (WPC-S)

Related tips

• One coil will not fire
• A solenoid will not fire in the solenoid test
• Two or more coils fire together
• Coil-not-working checklist
• Grounding test for WPC coils 1-8
• No flashers work
• Checking the coil supply at TP6
• A coil does nothing although its fuse is good

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