Digit display with MASC driver is blank, Failed power supply

Potential Symptoms

  • Display is blank.
    • Multiple or both displays are blank.
  • Getting 0 VDC out of the power supply even though there is 120 VAC into the power supply.
    • May also see if voltage from power supply is diminished (i.e. only measuring 13.8vDC rather than 24vDC).
  • Power light is not lit on the driver (all lights on the driver are off).
    • Power light may be lit if voltage from power supply is present, enough to light LEDs but but not the correct voltage for operation.


  • Product Family: Digit and Price Displays
  • Product: DataMaster, DF-1020, DF-1030, DF-1040, DF-1060, DF-2000, FL-2109, Rate, Event Counter, Gas, Fuel or Petroleum Price Displays, DF digit product using a MASC Driver
  • Component: Power supply
  • Control System:


  • Failed power supply.


  • Replace power supply.

KB ID: DD2021595

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