The game keeps reporting switches 81 and 82 (the Frankenstein drop target bank) as broken. They register in the switch edges test but fail in the up/down bank test, and multiball starts without the bank dropping.

Game reports switches 81 and 82 broken but they work in switch test: connectors

Cause: Poor contact at the connectors and header for those switches.

Checks

• Run the bank up/down test and watch whether the switches change state as the bank moves.
• Check the switch wiring for stretched or broken common wires where the bank moves.

Fix

• Reseat the connectors for those switches and reflow the header pins on the board they plug into.

Systems

• WPC-95

Games

• Monster Bash

Related tips

• CPU board switch connectors
• Replacement .100" Molex parts for the CPU switch connectors
• Slam tilt when both slingshots fire together: sling switch wired wrong

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