The game reboots over and over at about two-second intervals from switch-on.

Game resets every two seconds

Cause: A bad batch of 6264 RAM went into games around the Shaq Attaq era; U11 (74HC123) is another cause.

Checks

• Note that the U3 RAM can pass the memory test and still be bad.

Fix

• Replace the 6264 at U3 regardless of test results.
• Replace U11 with a 74HC123 (not 74LS123).
• Update the game EPROM to the latest revision.

Systems

• Gottlieb System 3

Related tips

• Logic chips worth stocking
• CPU board will not boot, or keeps rebooting
• U11 must be a 74HC123AN
• Replace a failed 6116 RAM with a 6264
• Game stuck showing the last four high scores
• Resets remain after rectifiers, caps and connectors are done
• Battery voltage at the RAM but memory still lost
• The CPU memory battery is built into a non-socketed RAM chip

Source: Repairing Gottlieb System 3 Electronic Pinball Games from 1989 to 1996, Clay Harrell (pinrepair.com)