No power or a blank screen on the DM100i-DM200i and DM110i-DM220i

Products affected:
DM100i / DM150i / DM200i (P720, P725)
DM110i / DM160i / DM220i (PR20)


The display screen is blank or black.


The meter is in sleep mode, is not receiving power, or the contrast is too low.


UPDATED: 26 September 2019
Check the power LED light:
  1. If the LED is amber, the meter is in sleep mode:
    • Press any button to wake the meter.
Image showing the LED button lit with an Amber light
  1. If the LED is off, the meter is either turned off or does not have power:
    • If there is a power switch on the back of the machine, check that it is set to the ON position ( | ).
    • Check that the power cable is plugged into the back of the meter and into a functioning electrical outlet.
Image showing the LED buttons all off
  1. If the LED is green, and/or the machine makes noises like it is booting up when first plugged in, it may be a display issue where the contrast needs altering.
    1. Unplug the meter for 10 seconds.
    2. Hold down the number 4 button while plugging the meter back in. This will reset the contrast to the default setting.
Image showing the LED button lit with a Green light