Mine says this option is locked by the person who set up printer. That was me??

Ein interessanter Tipp mit einem Aber, denn Drucker mit einem großen Display lassen sich nicht überlisten.

Hello, I see that your cartridges have pigment ink, don't I? Do the original cartridges use pigment ink? Gracias

Isnt that just turning off the notifications?

What is the name of the drill you used and where did you get it?

I found out from a 3rd party Ink manufacturer that one cannot downgrade firmware by yourself. It takes an HP technician with an EEPROM flasher to downgrade. 3rd party cartridge makers program chips to fool or bypass firmware but have to reprogram chips when HP comes up with another firmware. Plenty of law suits against HP because in essence, it's a monopoly, can you say antitrust? 😮

How do you downgrade the firmware on this model?

So you can use replacement cartridges for the lc404 and it will work