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Clear and erase error message - reprogramming commands

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Nancy to others,

 

I have a 2009 HP OfficeJet Pro 7780. 

 

It currently has an error message that the  "rear access panel open".  I continually open and close the rear access panel, hit OK,  and turn the printer off, disconnect all plugs and reconnect,  and wait two minutes and turn it on again.  The error message never clears.

 The rear access panel is a simplistic piece of plastic, on a hinge - simply a door.

 

In the old days - sometimes I would have error messages that would not og away, despite fixing the problem.

When error messages would not go away, I would call up HP, with whom I had a service contract and they would give me the commands or programming instructions, that would erradicate the "error message". I would punch in a series of

codes using a mix of numbers and comand options on the front panel, turn printer on and off and the fake "error message" would disappear.  They were giving me instructions over the phone for reprogramming it, I think.

 

I just called HP technical assistence >>  HP doesn't support the OfficeJet Pro 7780 anymore.

 

Does anyone know the sequence of commands needed to erase a malfunctioning error  message - on any HP model?

Or have any other ideas on how to get rid of fake "error message"?

 

 


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