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PAR+/MSC+ ISSUE: stations not turning on or stuck on

To power down a PAR+ or MSC+ cabinet, flip the master switch located in between the OSMs to the off position.

To power down a PAR+ ES cabinet, flip the master switch located in next to the transformer to the off position.


  • On the ROM8 or OSM output board, check the connector that the ribbon cable plugs into for corrosion on the pins. Also check that the ribbon cable leading out of the unit is free from damage or corrosion.
  • Check the power connector wire leading out is not damaged.
  • Check for loose or corroded field wires at the screw-in connectors. Make sure that the connection is tight.
  • Swap the output board with a known working one. If this fixes the problem, send the original in for reconditioning. Create a UPS Shipping Label HERE.
  • If the issue persists, check the terminal Board, swapping it with a known operational one to rule out the timing mechanism.
  • Check the large white connectors (where the timing mechanism plugs into) for corrosion and damage.