Star Trek: The Next Generation
Williams, 1993You're currently viewing posts by Pinsider pins4u.
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Did you perform the work with the game switched on?
As above, unplug the two connectors bottom right of the MPU - J206/207/208/209 - does the message go away?
YES: you have a wiring issue on the playfield
NO: U20 is likely toast - usually caused by shorting things on the playfield while working on the machine. This can fry in microseconds if you touch the wrong things.
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Gaborone
Mechanicsville, VA