02/18/2021
HP CP2025, CM1312MFP, CM2320MFP, M375MFP, M475MFP,
M476MFP, M351, M451 Fake Paper Jam in Rear Door
This problem is caused by the guide on top of the registration assembly in the back of the printer being out of position.
Physical damage to that specific part because of a paper jam causes the printer to show a false paper jam in the back door.
This problem can be seen from the back of the machine. Check the registration roller and make sure it is in the right position.
If there is a problem with the registration, you will see the guide is not all the way up and it does not go back to the original position right away
If the issue is confirmed, carefully move the guide to left or right to see if it will go to its home position.
If not your printer will need most likely need a new assembly.