HP Deskjet 6840 Printer series - Replacing print cartridges

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Replacing print cartridges

When buying print cartridges, look for the print cartridge selection number.
You can find the selection number in three places:

• Selection number label: Look at the label on the print cartridge that you are


HP Deskjet 6800 series printer


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1. Selection number label

• Printer documentation: For a list of print cartridge selection numbers, see the

reference guide that came with the printer.

• Print Cartridge Ordering Information dialog box: For a list of print cartridge

selection numbers, open the printer


, click the Estimated Ink Level tab,

and then click the Print Cartridge Ordering Information button.

If a print cartridge runs out of ink, the printer can operate in the

ink-backup mode


For information about installing a print cartridge, see the

print cartridge installation