Here are some steps on how to fix your scale power issue:
Step 1: Level your Scale
Make sure you scales feet are all adjusted to the same height.
Make sure your scale is on a flat surface.
Step 2: Plug in Cords
Plug in the power cord to your Scale.
Plug in the adapter jack in to your Scale.
*Do Not turn on your Scale*
Step 3: Wait
(while your printer is off) Wait 15 minutes for your scale to complete process time.
Step 4: Turn on your printer
Turn your printer on and make sure it is giving a reading when placing something on the scale.
Make sure it is giving the correct reading.