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LaserJet pro 400 color m451dn

hp laserjet pro 400 color m451dn keeps saying "Jam in Tray 1" I have looked and there is no paper in the printer. I pulled tray 2 out and looked under the tray 1 plate and also pulled the back cover off and there is no paper in that location either. 

 

I replaced the the rollers that sit behind tray two as that is what a lot of people are saying fixed their issue. I cleaned out everything i could in the printer and even with ZERO paper in tray 1 it still kicks out "Jam in Tray 1"

 

Anyone able to help me out here?

 

thanks

1 REPLY 1
HP Recommended

I have worked on a couple of the MFP versions of this device and have found that the optical sensor in the paper path near the rollers fails and causes this unclear able error.

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