HP 4620 - Manual (Page 219)

To temporarily print using black ink only, click Cancel Print and then re-send the print job. The
Use black ink only? message appears before the job prints. The empty cartridges will need to be
replaced soon.
CAUTION: Do NOT remove the empty color cartridge to print in Use Black Only mode.
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.
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.
ADF cover open
Close the cover of the ADF to continue.
Problem with ink system
Please remove the ink cartridges and examine them for any sign of leaks. If any cartridges have
leaks, contact HP. For more information about contacting HP, see HP support. Do not use
cartridges that are leaking.
If there are no leaks, re-install cartridges and close the printer cover. Turn the printer off then on
again. If you get this message a second time, contact HP. For more information about contacting
HP, see HP support.
Problem with ink system 215