This document explains how to resolve a problem associated with the HP No. 78 Inkjet cartridge and the following printer models: HP Deskjet 970, 930, 950, and 1220; HP Photosmart P1000/1100,1000,1200, and 1300 series; and HP Officejet G and K series.
Symptoms include the following:
An “Incorrect Color Cartridge Installation” warning on the computer screen.
Flashing cartridge light on the printer (indicates a defective color cartridge).
The error “Remove and check black or color cartridge” appears on the front panel.
In most cases the printer prints without any problems. If you encounter these symptoms, perform the normal corrections for rejection. See the instructions below.
The printer has a cartridge-check feature. If it detects a cartridge-contact problem such as dirt on a contact, it will give warnings. The warnings notify that a correction must be made, such as re-seating the cartridge or cleaning the contacts. When a problem is detected, a software flag is set within the printer that should be reset when the contact problem is corrected. Because of a firmware error, the flag does not reset until a hard reset is performed on the printer and repeated warnings are delivered. A hard reset resets the flag and eliminates the warnings.
What if the symptoms do not disappear when a hard reset is performed?
This indicates that another problem exists with the cartridge or the printer. Try a replacement cartridge. If the problem persists, the printer will need to be serviced.
Is HP doing anything to prevent this in new products?
Yes. Changes were made to the firmware in later model printers to reset the error flag without the need to perform a hard reset to the printer.