LED100 is out and fuse F101 is blown.

WPC-95: regulated 12 V fuse F101 blows

Cause: Often a failed U20 on the CPU board; also suspect the LM7812 regulator Q2 on the driver board.

Checks

• Check CPU board U20 as described in the switch matrix section.
• Test regulator Q2.

Fix

• Replace the failed part, then the fuse.

Systems

• WPC-95

Related tips

• WPC-95 LED100 off (+12 V regulated)
• Where the CPU board gets its power
• Live voltage checks for the F114/F115 message
• Switch matrix fuse F115 (F101 on WPC-95) blows as soon as it is replaced
• "Check Fuses F114/F115" (F106/F101 on WPC-95) message
• "Check Fuse F114/F115" (F106/F101 on WPC-95): step-by-step
• What is on the WPC CPU board
• What a WPC game reset is

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