After a cleanup the game barely starts: lights come on only after a coin or sometimes the start button, the score motor does not run and no voltage reaches it.

Game won't start and score motor won't run: bad fuse clips on the 25 V fuse

Cause: The fuse clips for the 25 V fuse had gone bad, so the fuse was not making contact.

Checks

• Measure voltage on both sides of each fuse in its holder, not just the fuse out of circuit.
• Look for loose or tarnished fuse clips.

Fix

• Reseat the fuse and tighten, clean or replace the worn fuse clips.

EM games run some circuits at line voltage; unplug the game before working on the fuse block.

Systems

• Electro-mechanical

Games

• Slick Chick

Related tips

• Solenoid fuse blows
• A fuse blows as soon as a game is started
• Finding why a fuse blows: start with which circuit

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