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Using and Caring for Your
Print Cartridges
Print Cartridge Status
The Print Cartridge Status Light flashes when one
or both of your print cartridges are low on ink,
improperly installed, or malfunctioning. It will
also flash if you are trying to use the wrong print
cartridge type.
Replacing Print Cartridges
6410923
Print Cartridge Status Light
Note: When buying replacement print cartridges, check the part numbers
carefully. The print cartridge numbers for the 840C, 842C, and 843C
printers are:
Black HP No. [15] (equivalent to C6615 Series)
Tri-Color HP No. [17] (equivalent to C6625 Series)
Note: When a print cartridge runs out of ink, leave the empty cartridge in
the cradle until you can replace it. The printer does not print with only one
print cartridge in the cradle.