A single controlled insert lamp stays on all the time (it only goes out when the game tilts). Everything else works, the connectors have been repinned and the socket replaced.

One insert lamp locked on with a Pascal all-in-one board: failed lamp driver IC

Cause: The driver array IC on the replacement board that drives that lamp had failed shorted. The likely root cause was a bent socket whose contact touched the lamp frame, shorting the lamp line.

Checks

• Check the lamp socket and nearby leaf switches for anything shorting to the frame.
• Use the board maker's documentation to find which driver IC handles that lamp.

Fix

• Replace the failed driver IC on the board.
• Fix or replace any bent socket that could short against the frame, or the new IC will fail the same way.

Systems

• Gottlieb System 1

Games

• Genie

Related tips

• Shorted lamp sockets kill MPS-A13 drivers
• How CPU-controlled lamps are driven
• How the Tilt and Game Over lamps are switched
• All CPU controlled lamps are dim
• None of the CPU controlled lamps light
• No CPU controlled lamps light
• Testing a CPU lamp circuit by grounding its driver
• Groups of four lamps or single lamps misbehaving

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