How to resolve a blank display on a DM400, DM500, and more

Products affected: DM400™, DM500™, DM550™, DM800™, DM800i™, DM900™, DM1000™, and DM1100™


The display is blank, or appears dead.


The display is not getting power.


If the meter is off the base:
  1. Ensure the a/c adapter is connected tightly at the back of the meter, the wall outlet, and where the two parts of the a/c cord join
  2. If still no power/no display, try the meter on the base
If the meter is on the base:
  1. Check the On/Off switch on the left side of the machine. The switch should be on "I" for On.
  2. Pull the plug out, and then re-plug.  Ensure the plug is pushed in tightly.
  3. Try another power outlet, preferably a direct wall outlet (not a power strip).  A single outlet in a power strip can burn out.
If your issue is not resolved, contact customer support from 8 am to 8 pm Eastern Time. Have your model number ready.

UPDATED: February 07, 2021