@MichaT I suggest you check my private message for steps on performing a full reset, the instructions are designed for your specific printer and if anyone with a different model would try the steps, it may render the printer unstable, hence a private message would be the safest way of sharing this information:
Click here to access the private message function.
Stand by for updates!
And have a good day.
Welcome to the HP Community!
(P.S: If anyone wants these instructions for their specific printers, please create a public post and tag me, I'll be happy to help).
Riddle_Decipher
I am an HP Employee