asked Feb 13, 2013 at 7:58am
Hp HP LaserJet 4L

HP Laserjet 4L

I can insert a single sheet of paper or an envelope into the manual feed slot on this printer and it starts in to be printed, goes about half an inch and stops (jams). The paper sensor arm as pictured here on this website is not broken and moves freely along with the part it is attached to. Any ideas on what may be causing this jam? It happens at least 9 times out of 10.