Hello, I have three HP 400 M401dn printers at a customer's office and they are complaining of grey / gray background on their labels when they print them.
All three printers do this and they are all new so i am ruling out the toners, which are the original HP brand.
If a label sheet is reinserted to be used again because there are labels left, then the grey background is even darker. Ater 4 reinsertions the background is very dark. (You can see it even on the first label, it is light but there.)
I checked all of the driver settings and nothing seems wrong. The driver is set for label printing so that's not it.
Can anyone tell me why this is happening? Thank in advance!