HP Officejet 7612 Wide Format e-All-in-One - Manual (Page 305)

Black cartridge out of ink
The black cartridge is out of ink.
Solutions: Replace the black ink cartridge. For information about how to install new cartridges, see
Replace the ink cartridges on page 92.
CAUTION: Do NOT remove the empty black cartridge to print in Use Color Only mode.
To temporarily replace black with color, click Cancel Print and re-send the print job. The Use color ink
only? message appears before the job prints. The black cartridge will need to be replaced soon.
288 Appendix G Errors (Windows) ENWW