The printhead appears to be missing, not detected, or incorrectly incorrectly installed.

[RocknRon1]

Error message on 8630 printer: "The printhead appears to be missing, not detected, or incorrectly installed."  (Even after reinserting cartridges).

[sandytechy20]

@RocknRon1

Welcome to the HP support community.

Reseat the printhead up to three times

1. With the printer turned on, unplug the power cord from the rear of the printer.

2. 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.

   

3. Close the cartridge access door.

4. Reconnect the power cord to the rear of the printer.

5. Wait for the printer to start, and then look for the error.

   • If the error message persists, repeat the steps to reseat the printhead up to three times.

Update the printer firmware

Updating the printer firmware might resolve printhead problems. Go to Updating or Upgrading Printer Firmware for more information.

You can refer this HP document for more assistance:- Click here

I hope that helps.

To thank me for my efforts to help you, please mark my post as an accepted solution so that it benefits several others.

Cheers.

[TGMc]

This did not help. I even removed the printhead and cleaned residue off with paper towel and alcohol. It seems like there would be an easy fix to this since it just suddenly began happening.