HP Deskjet 1012 Printer - Manual (Page 53)

Identify a defective cartridge
To determine if an ink cartridge is defective, do the following:
1. Remove the black cartridge and then close the cartridge access door.
2. If you get the cartridge problem message again and the On button light blinks quickly, replace
the tri-color cartridge. If the On button light does not blink, replace the black cartridge.
3. Close the cartridge access door.
4. Try printing a document.
5. If you are still seeing the cartridge problem message, replace the black cartridge.
ENWW Identify a defective cartridge 49