HP 5400c Series - Manual (Page 109)

Back to TOC Troubleshooting and maintaining 109
4 Remove the jammed item from the ADF and replace the paper
lead.
5 Close the hatch. Press down firmly until you hear a click.
6 Restack all pages and reload them into the ADF.
7 On the ADF prompt on the computer, reselect any settings you had
changed and click Scan To or Scan again.