How to stop paper jams - HP LaserJet Pro 400 M401DN Laser Printer

Check the heater sensor an replace it

how to video

Jams in the Document Tray

When a document jams or misfeeds in the Document Tray, <OPEN COVER> and <SEE FIG. 1> <!!CHECK!! 5100> are displayed on the LCD.

Note
You do not need to unplug the fax when clearing document jams.

* When <OPEN COVER> and <SEE FIG. 1> are displayed alternatively

1. Press [Stop].

Important
Do not pull out the jammed paper manually at this point.

2. Hold down [Start/Copy] for a few seconds.

* The document will be fed out automatically.

* If the document is not fed out, gently pull the document out of the fax.

* When <!!CHECK!! 5100> is displayed

1. Check if any paper is jammed.
If jammed, make sure to take out all the jammed paper.

2. After taking out jammed paper, turn the fax off, then turn it back on with [ON/OFF].
Jams in the Multi-Purpose Tray

If paper jams in the Multi-Purpose Tray, <CLEAR PAPER JAM> is displayed on the LCD.

1. Gently pull any jammed paper out of the fax as shown, then press [Stop].

* Pull it gently in either direction.

* If you cannot pull the paper out, continue with the steps below.

2. Open the Printer Cover.

3. Gently remove the jammed paper inside the fax.

4. Press [Stop].
The fax returns to standby mode.

Jams in the Document Tray
When a document jams or misfeeds in the Document Tray, CHECK 5100 are displayed on the LCD.
When CHECK 5100 is displayed
1 Check if any paper is jammed.
If jammed, make sure to take out all the jammed paper.
2 After taking out jammed paper, turn the fax off, then turn it back on with [ON/OFF].
Jams in the Multi-Purpose Tray
If paper jams in the Multi-Purpose Tray, CLEAR PAPER JAM is displayed on the LCD.
1 Gently pull any jammed paper out of the fax as
shown, then press [Stop].
Pull it gently in either direction.
If you cannot pull the paper out, continue with the steps below.
2 Open the Printer Cover.
3 Gently remove the jammed paper inside the fax.
4 Press [Stop].
The fax returns to standby mode.

hello please check it properly.some time their have a small piece of paper.
or clean adf unit & service.

look for debris in the feeder very common to see staples, and paper clips in the paper path

Try two things:

Fan the paper before placing in the tray.

Raise the humidity in the room to at least 40% to avoid electrostatic sticking of the paper. Store paper in 40% humidity area.

Look for a small piece of paper that may be stuck in the switch indicating a paper jam.

Please follow the instruction given in this link:

clear the paper jam as given in this link:
http://support.lexmark.com/cgi-perl/knowledgebase.cgi?ccs=37:1:0:512:0:0&framed=&docid=ENUS25568&relevance=1

I get a Jammed paper message on the read out, I have cleaned out all the paper and pressed stop/cancel button but it still keeps saying that there is a paper jammed in it.