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HP LaserJet Pro M28, M29a, and M29w Printers - Blinking Lights

This document is for HP LaserJet Pro MFP M28a, M29a, and M29w printers.
The following sections describe error conditions with blinking (flashing) lights displayed on the printer control panel, followed by solutions for each error. Find the blinking light pattern that displays on the control panel, and then follow the steps to resolve the issue.
     Example of the control panel buttons, icons, and lights
  1. ID Copy button
  2. Start Copy button
  3. Supply light
  4. Power button and light
  5. Attention light
  6. Cancel button
Attention and Supply lights blink, and the Ready light is on
There is an issue with the toner cartridge.
The Attention and Supplies lights are blinking
Service or replace your HP product if you completed all preceding steps.
To see if your product is still under warranty, go to the warranty check website http://www.support.hp.com/checkwarranty. Contact HP Support to schedule a repair or replacement. If you are in Asia Pacific, Contact HP Support to find a local service center in your area.
Repair fees might apply for out-of-warranty products.

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