Question about HP LaserJet 4 plus Printer

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HP LaserJet 4 Printer stopped printing

Our reliable HP LJ 4 printer stopped printing a few days ago. It is connected by a parallel cable. The printer's display all looks normal with the online and ready lights lit and the display reading 00 READY. When I send a print job to it (even a test page) the document appears in the cue and seems to be processed fine. While the doc is in the cue, the green ready light on the printer flashes like it is supposed to when it is receiving data. Then the doc disappears from the cue as if it has been printed and the Green light on the printer stops flashing as if it finished printing the document but nothing has happened. It's just waiting for another print job.
If I use the printer's keypad, I can have it print out a self test sheet without any problem but anything coming from the computer looks like it's being received but nothing prints.
I'd apprecate any help I can get.

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  • stevec554 Mar 05, 2009

    There is plenty of paper in both tray 1 and the manual paper tray. It prints self test pages fine from both trays.

    It looks like when the Green light starts flashing after I've added a doc to the cue, the Form Feed light also comes on and stays on. When I push the On Line button to make it offline and push the Form Feed button, a single line of seemingly randon ASCI characters gets printed. Then the Form Feed light goes off.

    Any other ideas?


  • stevec554 Mar 09, 2009

    It turned out to be the data cable. It looked like it was passing the data to the printer so I didn't think that was the problem. But before I tried to replace it, I wanted to exhaust everything I could think of and after I switched the data cable, it worked like a champ.

    I hope this helps someone else.



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Try putting a piece of paper in tray 1

Posted on Feb 26, 2009


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