Question about HP LaserJet 4250n Printer
There are several thing which may cause unexpected jams in the duplex tray...,
1. first thing to do is eliminate all other possibilities by removing the netCard/Net connection Parralel connection so the machine is Stand Alone. make sure there is paper in the feed cassette 2 ( paper Tray)
press the TICK to enter menu
scroll down to diagnostic- press TICK
scroll down to paper path test - press Tick
scroll down to Source and select tray 2
scroll down to Duplex And select YES
( if the duplex option is not visible here then there is a connection/seating problem with the duplex tray)
Scroll down to copies and select 10
scroll up to print test page and press tick
the machine should now start duplexing 10 pages,
if you get the same error ( 1 page enters then jams)
it could be a dirty/snapped paper entry sensor,( looks like a little plastic match stick that protrudes into the feed path of the paper)
use a can of pressurised air to Blast any dust away from this arm and the surrounding area being careful to follow the Paper sensor Arm back to the sensor and blasting this as well-
Duplexer tray are cheaper than an engineer call out, if the fix above fails , your cheapest option may be a replacement Duplexer tray, available from most HP office equipment Stores as well as Belmonte Business Equipment.
Posted on Sep 13, 2013
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Posted on Jan 02, 2017
SOURCE: Duplexer problem
First, the machine always prints the first page first. Make sure you have the right driver (4 plus and not 4)and check the settings in the device settings of your printer driver on the pc. Also make sure the duplex unit is for the 4 plus and not the 4.
Posted on Jun 21, 2007
Follow the instructions in this video. If you follow those instructions and still get the message, you may need to replace your printer or the rear door.
Posted on Jun 17, 2009
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