Sounds like your encoder strip is dirty. If you open the printer and look you will see a plastic strip with barcode printing on it. Use a small rag, cotton ball or Qtip with a little alcohol applied.
Wipe the strip clean. Close the printer and retest.
~Rick
Bay Area - CA
~R5 C (1.0.7.1) ~RF Trinity, ~RF 100 Macro, ~RF 100~400, ~RF 100~500, ~RF 200-800 +RF 1.4x TC, BG-R10, 430EX III-RT ~DxO PhotoLab Elite ~DaVinci Resolve ~ImageClass MF644Cdw/MF656Cdw ~Pixel 8 ~CarePaks Are Worth It
