Question about HP Officejet J5780 All-In-One InkJet Printer

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All the lights are flashing and it says turn power off and then on. I did that and the same thing keeps happening

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The main board of you printer is already broken

Posted on Feb 04, 2010

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Posted on Jan 02, 2017

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Perform a partial reset of the HP All-in-One
  1. Turn on the HP All-in-One.
  2. Disconnect the power cord from the back of the unit.
  3. Press and hold the # and 3 buttons simultaneously.
  4. While still holding down the # and 3 buttons, connect the power cord to the back of the unit.
  5. Continue holding the buttons until the Power button blinks.
  6. Follow the instructions that display on the unit to select the language settings.
If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.
Thanks, Joe

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