Assuming for the moment that your printer is the same model, please see and follow the suggestions from the Printer's Troubleshooting Section on this subject:
A 'Paper Jam' Error Displays on the HP Officejet Pro 8600 Printers
For more possible focus on your issue, please start a new Thread of your very own -- include the model / Product number (NOT serial number) of your printer, your operating system, and a brief description of the steps you have tried to rectify the problem.
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