During a game the displays go blank, the MPU flashes seven times and the game restarts, while the GI stays lit.

Globetrotters reboots during play (GI stays on)

Cause: Usually a failing C23 on the solenoid driver board, poor J3 connections between the solenoid driver and rectifier boards, or bad MPU chip sockets or oxidized chip legs.

Checks

• Measure the AC ripple across C23 and check SDB and rectifier J3 pins as in the reset section.

Fix

• Replace C23, repin J3 on both boards, and renew bad MPU sockets.

Systems

• Bally MPU AS-2518-35

Games

• Harlem Globetrotters On Tour

Related tips

• Game reboots during play from slam switch noise
• MPU reboots right after the seventh flash
• Game reboots at random: R11 heating Q5
• Good MPU stays LED-on with a PC power supply
• Game resets or locks up when the flippers are used
• Reading the MPU flash code
• What each MPU LED flash proves
• What a good MPU does straight after the last flash

Source: Repairing Bally Electronic Pinball Games from 1977 to 1985, Part Three, Clay Harrell (pinrepair.com)