The ramp rope (chase) lights do not run in the "running lamps" test or in play.

Star Trek and Hook ramp chase lights do not run

Cause: Usually the ULN2003 on the small driver board in the upper right of the backbox; the board also carries a 74HCT04 that inverts the CPU signals.

Checks

• Run the running lamps test and probe the board inputs, the 74HCT04 outputs and the ULN2003 outputs (which should be pulled low) with a logic probe.

Fix

• Replace the ULN2003, or the 74HCT04 if its outputs do not follow the inputs.

Systems

• Data East CPU Version 3

Games

• Hook
• Star Trek

Related tips

• A single lamp is out: the usual causes
• Lamps on a plug-in lamp board do not light
• Dot matrix shows lines or lights solid, and no CPU lamps work
• Every CPU-controlled lamp is out
• Star Trek 25th Anniversary: CPU and display EPROM types and latest versions
• DMD shows lines or garbage and no controlled lamps light
• One controlled lamp never lights, bulb is good
• Lamps in a row or column light twice per sweep

Source: Repairing DataEast 1987 (Laser War) to Sega 1995 (Batman Forever), Part Three, Clay Harrell (pinrepair.com)