Question about HP Officejet Pro L7780 All-In-One InkJet Printer

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Buttons dont work - HP Officejet Pro L7780 All-In-One InkJet Printer

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Do you see any error messages in the LCD display?

Try resetting the printer as below

Power Drain:

  • Turn OFF the printer, disconnect the power cable from backside of the printer and from wall outlet.
  • Press and hold the Power button for 60 seconds.
  • Connect the cable and turn ON the printer.

Partial Reset

  • Remove the power cable from back side of the printer while its ON.
  • Press and hold "#" and "3" button, while holding them both insert the power cable and release the button after 10 seconds.
  • If printer turns OFF, press power button to turn it ON.

Semi-Full reset


  • Remove the ink cartridges.
  • Remove the power cable from back side of the printer while its ON.
  • Press and hold "#" and "6" button, while holding them both insert the power cable and release the button after 10 seconds.
  • If printer turns OFF, press power button to turn it ON.
  • Insert the ink cartridges.

Posted on May 22, 2011

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