Big storm Fred heading our way, so I turned all my printers off, unplugged the UPS's they were plugged into - shut them down from their panels and left them all off for 2-3 days.
When I rebooted them, I got the same BS, as described in this thread, but it was a printhead that needed to be reseated.
Shut down again from the back switch again. Unplugged the printer, shut the switch to off, re-plugged in the printer and restarted.
As it was coming up I just pulled the plug while the carriage was moving.
Made sure back switch was off, unplugged LAN cable, then plugged power back in and restarted.
It came up fine - no errors.
Several restarts often will clear errors - guess it confuses the initialization process and it forgets what it was having problems with.
This has worked for cartridges too.
LAN cable unplugged is a must, beats me why - I just know it works.
This is, as John discussed, something that is relatively new, and almost never an issue in the past.
I did help HP track down a bad batch of yellow cartridges - they found the problem, but it could be back. (They didn't say what the problem was).
Multiple restarts. That's what I do.
If there are no printhead errors, but a cartridge error, just pull all the carts, (from the panel selection to reseat or replace) restart and let the machine ask for them. When it asks for them one by one, it does a chip check, and as we all know, if the cartridge is out of warranty, it presents the choice to agree that the cartridge has expired and to agree that any problems in the ink system in the future would not be covered by warranty. When we say: "yeah yeah, ok", the printer thanks us for using HP inks and moves on to the next. If each cartridge is accepted by the printer (even if conditionally) it should go on and initialize without issue.
Best-
Mark