Bally Star Trek (Bally, 1979) Issue - Game randomly freezes up..

ScottyMac

Pinball Nudger
Joined
Nov 23, 2020
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Favorite Pinball Machine
Star Trek NG
Game will freeze up.. a single tone will ring out... and the scoring display goes out.. switches stop working also... all the other lights stay on and the single tone just keeps on going till you turn it off? Not sure where to start other than going in and cleaning all connections.
 
Game will freeze up.. a single tone will ring out... and the scoring display goes out.. switches stop working also... all the other lights stay on and the single tone just keeps on going till you turn it off? Not sure where to start other than going in and cleaning all connections.
When the machine freezes up is the mpu led always on?
Has the mpu board ever had any battery leakage damage?
Machine lock up problems are usually a mpu board malfunction or bad connections , rectifier board connections and solder cracks on solder side of board, or problems with the 5 volts made by the solenoid driver board.
When turning the machine off then on does the mpu led flash multiple times and then the machine powers up?
 
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