Question about HP LaserJet 2840 All-In-One Printer

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I have a hp laserjet 2840. Screen says scanner error 6. turning off and on did not help

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  • Master
  • 1,952 Answers

Tools:
1 - torx screwdriver
1 - flathead screwdriver
1 - microfiber or some cleaning that doesn't leave dust

Fix:

  1. Turn off the printer
  2. Take the ADF unit off: unplug the power connector of the ADF unit and pinch the holding brackets
  3. using torx screwdiver remove the screws on top of scanner unit
  4. using the flathead carefully lift the top of the scanner unit (including the glass)
  5. using microfiber clean the inside of the glass, especially the area with the "black/white" bars. This is the "Home" location of the scanning head. DON'T USE any spray or liquid!!!
  6. gently move the exposed scanner head (that's the thing the glows and moves) about 1/2 inch from the home location to the left.
  7. Reverse the steps above to put the glass and scanner
  8. Once the printer is on, the scanner head will be lost and will seek the "Home" location. Now that the "Home" location is clean, it will find it. Error should disappear. If it does not then you need to move the scanner head more the 1/2 inch.

Posted on Jun 17, 2009

  • mohammed marika thambi
    mohammed marika thambi Jun 17, 2009

    I hope engine error it went into service at an authorized service provider since
    they have the ability to call hp technical support which should have
    some answers as to what the problem may be.


  • mohammed marika thambi
    mohammed marika thambi Jun 17, 2009



    These errors can be cause by many
    reasons. Communication I/O errors, memory bus, image decompression and
    complex image printing are examples.
    Visit the CLJ2820 support web site at
    HP.com to compare the latest available firmware to what is indicated on
    the configuration sheet under the Product information block - firmware
    datecode.


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