Sound 16 does not play when the sound board is tested.

Haunted House: no sound 16 in the sound test

Cause: A break somewhere along the sound 16 path, which uses the DS3/LD4 lamp signals.

Checks

• CPU board: lamp control chips Z32 (7417) and Z34 (7404).
• Connector A1J4 between CPU and driver board.
• Driver board: Z3 (74175), then transistor Q10 (MPS-A13).
• Driver board connector A3J2 pin 9, then A12J4/P4 pin 6, then A6J1 at the sound/speech board.

Fix

• Replace the failed chip or transistor, or repair the bad connector.

Systems

• Gottlieb System 80

Games

• Haunted House

Related tips

• System 80 driver board transistor types
• Haunted House switch matrix wiring
• Haunted House driver board: which transistor runs which coil
• Driving the Haunted House up-kicker from a pop bumper driver board
• Haunted House trap door won't open
• Haunted House and Black Hole sound board DIP switches
• Background sound stuck on after a slam tilt
• Haunted House playfield-mounted transistors Q1 to Q3

Source: Repairing & Upgrading Gottlieb System 80 Pinballs from 1980 to 1989, Part Two, Clay Harrell (pinrepair.com)