Spare plug marked DOT POWER (J604) after a move: only for the original display

If a plug labelled DOT POWER at J604 is left over after reassembly and the game plays normally, check which display is fitted. That plug carries the high voltage for the original plasma dot matrix display. A low-voltage LED replacement display does not use it, so on those games it is meant to be left unplugged. Tie it back safely rather than leaving it loose.

With an original plasma display fitted, this circuit carries high voltage; keep clear of it with the game on.

Systems

• WPC-95

Games

• Junk Yard

Related tips

• Blank display, garbage or diagonal lines: reseat ribbon cables
• DMD blank and F602 blows after rapid power cycling: bad D11, then a reversed ribbon
• Where the CPU board gets its power
• A coil keeps firing at power-on and the DMD is blank
• Where GI power flows on the driver board
• Check the AC power input connectors too
• Taking the power driver board out of the backbox
• Supplies made on the WPC power driver board

Source: Pinball Repair help group!! (Facebook group)