12-01-2019 02:42 PM
The connection to the printhead has disappeared and there is an error blocking the printer panel.
The serial number of the external label of the printer does not match the serial number obtained by software with the utility of the hp assistant. The printer was purchased in 2013 and has never been changed or repaired.
Sorry for my English.
12-03-2019 04:41 PM
Welcome to HP support community.
Reseat the printhead up to three times
With the printer turned on, unplug the power cord from the rear of the printer.
You must disconnect the power cord before reaching inside the printer.
Lift the carriage latch, slightly lift the printhead, lower the printhead back into the carriage, wiggle the printhead left and right, and then lower the carriage latch to lock the printhead into place.
Close the ink cartridge access door.
Reconnect the power cord to the rear of the printer.
Sometimes error messages persist after inserting the printhead. If the error message persists, repeat the steps to reseat the printhead up to three times.
You can refer this HP document for more assistance:- Click here
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