Question about HP LaserJet 5550 Printer

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Hi, we have an HP 5550N printer which has decided to just stop working, the LCD is white and all 3 lights are lit. We have tried turning off and left overnight but it still has not recovered, please can anybody help. Jo

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  • joannehawxwe Oct 07, 2010

    This is a networked printer, does the printer need uninstalling on the network and re install?

  • joannehawxwe Oct 07, 2010

    The HP4550N LCD is white and all three lights are lit, they are not flashing, they are just lit. We have disconnected the power source and reconnected and the printer is still the same. The printer is network connected. Thanks Jo

  • joannehawxwe Oct 07, 2010

    Thank you, this was very helpful. Jo

  • joannehawxwe Oct 08, 2010

    HI, we have added new RAM and this has made no difference to the problem with the machine. LCD still white and all three lights lit, are you able to offer further advice? Joanne



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This problem is as a result in the unit RAM crashing. The RAM is the device power house and without this the device can hardly function no matter how long you put it off it still wont be able to process anything. The only solution to this is to get an expert to replace the RAM for you if you cant do it.
First you will have to order a replacement for the RAM and then then get it replaced.
Hope this solution has been helpful?

Posted on Oct 07, 2010

  • Rockme
    Rockme Oct 08, 2010

    Usually after replacing the RAM you are suppose to do like an installation of the units firmware. I recommend you get an expert to help out with this. If this does not work then it would be better for you to refer the unit to the HP center as i am out of diagnosis.
    Hope this solution is helpful?


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Joanne, Please follow the link below to first uninstall and then reinstall the printer. Remember that reboot in between is as important as the installation. In the mean while let me look for some more info on the problem.

Posted on Oct 07, 2010

  • Rinoo Kumari Oct 07, 2010

    I suppose no. But did you unplug the printer from the power source. I just read in the online manual that if all lights are flashing then it should also be unplugged besides being powered off. Try that now.

    Given below is a copy of the page on All Lights Flashing:

    printer lights are flashing or on
    printer lights are flashing or on
    l what the lights indicate
    l Print Cartridge Status light is on
    l Print Cartridge Status light is flashing
    l Resume light is flashing
    l Power light is flashing
    l all lights are flashing
    what the lights indicate
    Flashing or on lights indicate the printer status.
    1. Print Cartridge Status light 2. Resume light 3. Power light
    Resume light is flashing
    the printer may be out of paper
    1. Place paper in the In tray.
    2. Press the Resume button on the front of the printer.
    there may be a paper jam
    Follow these instructions to clear a paper jam.
    the printer may be ready to print the second side of a two-sided document
    file:///C|/Projects/Newport/Mac_UG_huykuna/ug_flashing_light_problems_fs.html (1 of 2) [5/9/2002 9:41:20 AM]
    Newport Hykuna Mac UG Final
    printer lights are flashing or on
    1. Follow the onscreen instructions for printing the second side.
    These instructions appear when you manually print a two-sided document.
    2. Press the Resume button.
    Power light is flashing
    the printer is preparing to print
    The light stops flashing when the printer has received all data.
    all lights are flashing
    the printer may need to be restarted
    1. Press the Power button to turn off the printer, then press the Power button to
    restart the printer.
    Proceed to step 2 if the lights continue to flash.
    2. Press the Power button to turn off the printer.
    3. Disconnect the printer from the power source.
    4. Reconnect the printer to the power source.
    5. Press the Power button to turn on the printer.
    file:///C|/Projects/Newport/Mac_UG_huykuna/ug_flashing_light_problems_fs.html (2 of 2) [5/9/2002 9:41:20 AM]



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try this out
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