On a 1975-78 Gottlieb multi-player the reels reset but the score motor keeps running.

Gottlieb multi-player: motor runs on at player 1 ball 1

Cause: The player unit's home switches P5A and P5B (the two-switch stack nearest the backglass) are dirty or misadjusted, so the Ax relay and bonus unit never get their reset signal.

Checks

• Step the player unit to its home position and check P5A and P5B close.

Fix

• Clean and gap P5A and P5B.

Systems

• Electro-mechanical

Related tips

• Wrong player comes up on ball 2 and scores won't reset: stuck P relay switch
• 1976 Gottlieb drop target games: score motor runs, AS relay stuck
• 1975+ Gottlieb won't reset: Ax/Bx latch relay blades out of their slots
• Score motor runs on at game over: end game relay not pulling in
• Score motor keeps running at start and the game never starts: clean the ball count unit
• Gottlieb reset bank solenoid and S start relay run on 120 V
• Won't start a game or reset the score reels: burnt game-over relay coil
• Player 1 'up' lights stay off during play: clean the coin unit contacts

Source: Repairing Electro-Mechanical (EM) Coin Operated Games to 1978, Part Two, Clay Harrell (pinrepair.com)