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HP Designjet Printer Series - Flashing Yellow Warning (Attention Light) with Blank Front Panel Display

Issue
Affected Products:
HP Designjet 10, 20, 30, 50, 70, 90, 100, 110, 120 and 130 Printer Series.
This document describes how to troubleshoot if the printers front panel display is blank or empty with only the warning or attention light flashing (next to the triangle with exclamation).
Solution
Follow the steps given below:
  1. Verify if the top covers (middle and right covers) are closed properly.
  2. Check if the rear panel (cleanout assembly) is seated correctly at the rear of the printer.
  3. If reseating the rear panel does not fix the issue, remove it and clean the electrical (copper) contacts in it. Also clean the corresponding electrical contacts on the printer itself. Reseat the rear panel.
  4.   note:
    If blocking the cover sensors fixes the issue, check if one of the hinges on the top cover sensors is broken and contact HP technical support for further assistance.
  5. If all the above steps do not help solving this issue, the rear panel (clean-out assembly) could be defective. Please contact HP technical support for further assistance.
    Click the below given URL to go to the support website:
    Click here to go to HP website at http://welcome.hp.com/country/us/en/contact_us.html

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