The player 1 score lights don't come on during play (they light during the reset), while the other players' lights work.

Player 1 'up' lights stay off during play: clean the coin unit contacts

Cause: Dirty spring contacts and rivet disc on the coin unit (on the motor board near the coin door), which select the player lights.

Checks

• If the coin unit is clean, check the player unit's wiper contacts and rivets, then the player 1 switches behind it.

Fix

• Clean the coin unit spring contacts and rivet disc with alcohol and adjust the leaf switches.

EM games have line voltage in the cabinet; unplug the game before working on stepper units.

Systems

• Electro-mechanical

Games

• Jungle Queen

Related tips

• Gottlieb Ax/Bx/Dx relays, coin unit and player unit: what each does
• Player unit sticks: clean off old lubricant, don't add more
• Start sequence keeps cycling after storage: clean the switch contacts and plungers
• Two-player game runs on to players 3 and 4: hidden broken wire on the coin unit
• Game keeps cycling the reset and starts in Game Over: dirty P5A switch and shorted wires
• Game starts but flippers are dead and nothing scores: dirty relay switches
• Bally coin unit
• Gottlieb player unit

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