I have an HP OfficeJet 7612 which suddenly began displaying the "Missing or failed printhead" error. I have seen many references to this error on the HP support site, but no good solutions.
Surely there is some diagnostic interface that allows the issue to be narrowed down to a point that the error can be corrected.
I've come across references to special sequences for button pressing, but none of those seem to work with the printer in its current state.
This printer should have much more life in it, given the light usage it has to this point. Likely less that 100 sheets printed.
Please provide some answer other than "Toss it and get a new printer."