Chip might be bad on the cartridge (yes you can get a replacement) or worst case scenario is the LLK channel dropped out. Better to do a small test print (after cleaning) than only constant head cleanings which can actually be counter productive. Let the printer "rest" overnight and nozzle check later.
Not really sure....but I pulled the cartridge out and noted that the ink seemed to have accumulated and the end that points away from the printer. Tapped it to move ink (in a bag?) closer to the business end.
That seems to have done it......at least right now.....
4880 is sensitive printer, if the cartridge rests for more then a month, print the auto test (even if it fails, let it be), take cartridges out, shake them and keep it over night. that usually makes it good.