HP OfficeJet Pro 7740 - Manual (Page 110)

NOTE: To turn the usage information function on, restore the factory defaults. For more information about
how to restore the defaults, see Restore original factory defaults and settings .
NOTE: You can continue to use the cartridge in the HP printer if you turn off the memory chip's ability to
collect the printer's usage information.
Ink cartridge warranty information
The HP cartridge warranty is applicable when the product is used in its designated HP printing device. This
warranty does not cover HP ink products that have been refilled, remanufactured, refurbished, misused, or
tampered with.
During the warranty period the product is covered as long as the HP ink is not depleted and the end of
warranty date has not been reached. The end of warranty date, in YYYY-MM format, may be found on the
product as indicated:
ENWW Ink cartridge warranty information 97