At start-up the game reports fuses F114/F115 (F106/F101 on WPC-95) as failed, yet both fuses test good.

Fuse-failure message at boot but the fuses are good

Cause: A bad bridge rectifier (diodes on WPC-95), or cracked pads at it.

Checks

• Check the bridge feeding those fuses and its solder joints.

Fix

• Replace the bridge or diodes and resolder or jumper the cracked pads.

Systems

• WPC Alpha-Numeric
• WPC Dot Matrix
• WPC Fliptronics
• WPC DCS
• WPC-Security (WPC-S)
• WPC-95

Related tips

• "Check Fuses F114/F115" (F106/F101 on WPC-95) message
• "Check Fuse F114/F115" (F106/F101 on WPC-95): step-by-step
• Switch matrix fuse F115 (F101 on WPC-95) blows as soon as it is replaced
• WPC-89/WPC-S driver board fuse ratings
• WPC-95 driver board fuse ratings
• WPC power driver board fuses and what they feed
• Which fault blows which driver board fuse (WPC-89/WPC-S)
• Typical causes of each blown fuse (WPC-89 and WPC-S)

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