HP 6700 - Manual (Page 217)

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.
Automatic document feeder cover open
Close the cover of the Automatic Document Feeder 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. 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.
Problem with ink system 213