HP Photosmart 7520 e-All-in-One Printer - Manual (Page 62)

Older generation cartridges
You will need to use a newer version of this cartridge. To identify a newer version of the cartridge, look at the
exterior of the cartridge package and find the Warranty Ends date.
If it says ‘v1’ several spaces to the right of the date, then the cartridge is the updated newer version. If it is an
older generation cartridge, contact HP support for help or replacement.
Click here to go online for more information .
Chapter 10
60 Solve a problem