Quoted from Jeff1960:Yes display driver board sorry for confusion. The good news is Captain Kirk was looking put for me as i remembered that i had an extra board , plugged in an booted up as normal.
All is good but the board that i replaced was a new display board about 10 years old.
Obviously the old one was OK as it works in it now but is their something I'm overlooking that may have caused this?
Clay mentions this in his repair guide. What are the voltages like on the display driver board? See below from the guide.
Last Reset Resorts - Failing Dot Matrix Controller/Display.
The game in question was Star Trek Next Generation, and the symptoms included occasional game resets, weak flippers, and dim lights. The usual stuff was tried: replaced all the bridge rectifers and filter caps, rebuilt the flippers, etc, and nothing worked. A bad transformer was suspected, so it was re-taped for 100 volts, as an experiment. After powering the game back on, immediate smoke was seen off the dot matrix display controller board. On closer inspection, a number of the diodes and large resistors on the dot matrix display board showed signs of severe heating (the experiment with the lower voltage tap wasn't nearly long enough to cause the damage observed - this had built up over considerable time). After rejumpering the game back to 115 volts, a spare dot matrix display board was installed in the game, and everything worked: bright lights, strong flippers, and no game resets.
Pittsburgh, PA
