HP 8150n displaying only asterisks on display screen

Posted on 2007-10-01
Last Modified: 2010-04-12
We have a HP LaserJet 8150n and are not able to print to it cause the display screen on the printer has asterisks all across it. Working fine before, but had a power outage over the weekend and not sure if that casued the problem. Already tried reseating the memory and formatter but still getting nothing different.
Question by:noaitmen
    LVL 6

    Accepted Solution

    Ignore the printer model and just pay attention to this article....

    most notably it says if you don't hear fans or feel anything coming out of them. it may be a dc controller issue.

    Author Comment

    The fan is working and ran the Engine Test and that passed but still getting the asterisks.
    LVL 9

    Assisted Solution

    From the service manual
    Power On Defects or Blank Display
    If the engine test was successful, perform the following steps:
    1. Reseat or replace the cable from the Control Panel that is connected to
    J203 of the DC Controller PCA (see the main wiring diagram in the back
    of the manual).
    2. Replace the printer's Formatter PCA. See Formatter Assembly on
    page 200 for instructions.
    3. Replace the Control Panel assembly. See Control Panel on page 165
    for instructions.
    If the engine test was not successful, verify that there is no paper in the
    paper path. Retry the engine test. If the engine test is still unsuccessful,
    replace the DC Controller PCA. See PCA, DC Controller on page 211
    for instructions.

    Probably not the cable to control panel or the panel since your's actually is working. Most likely the formatter board.

    Author Comment

    Replaced the formatter and now everything works great, thanks for the help!

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