I ordered this cleaning solution and cleaned the printhead, both soaking in the solution for some time and pushing the solution through. I’ve disassembled the printhead and cleaned the contacts on PC board.
I reseated the printhead one time and the printer worked until next day, when the same error appeared.
One day out of the blue, I recieved this error message: “The printhead appears to be missing, not detected, or incorrectly installed. I bought the HP OfficeJet Pro 8620 printer in 2015 and up until december 2019 it has worked perfectly.
I’ve read through most of the other threads on the internet about this problem, but I’m still creating this one both for documentation purposes, and in case someone has a solution that I’ve not thought of! Text in bold are considered important for the troubleshooting.
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