HP Photosmart C6340 All-in-One Printer - Manual (Page 282)

NOTE: HP recommends that you do not leave the ink cartridge outside of the
printer for an extended period of time. If a used cartridge is installed, check the
print quality. If it is not satisfactory, run the cleaning procedure from the toolbox.
Cause: The genuine HP ink cartridge was previously used in some other product.
Printhead appears to be missing or damaged
Try the following solutions to resolve the issue. Solutions are listed in order, with the most
likely solution first. If the first solution does not solve the problem, continue trying the
remaining solutions until the issue is resolved.
• Solution 1: Reinstall the printhead and cartridges
• Solution 2: Contact HP support
Solution 1: Reinstall the printhead and cartridges
Solution: If you just installed the printhead and ink cartridges, remove and reinsert
them using the following procedure.
NOTE: If you are setting up the product for the first time, make sure you follow
the instructions in the Start Here guide for installing the printhead and the ink
cartridges.
To reinstall the printhead
1. Make sure that the product is turned on.
2. Open the ink cartridge door.
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