Technical information

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quality) that you observed was more than likely caused by running one (or more) of your colors dry and
not because of the use of refilled cartridges - this is a very common customer complaint regardless of
which ink type is being used. Costco's ink formulations, which are made in America, 'closely' match that
of HPs and we actually install 10-20% more ink inside the cartridge.
When a color runs dry (i.e. you keep on printing after a color is noticed to be missing/out - unfortunately
most of the HP printers allow you to do this) but in doing so, this action introduces air bubbles into the
PRINTHEAD which leads to substandard image quality/missing colors. Typically, running a 'Clean
Printhead' routine 2-3 times will resolve this issue.
Costco inks provide above satisfactory color performance from in-house testing performed. While not
an exact color formulation match to the HP920 CMYK inks, they have been tested for general color
appeal and comparison performance - passing all quality performance expectations.
We regret your inconvenience, and we hope that you will continue to consider the compelling value of
inkjet refilling in the future.
For any additional questions please contact us directly: [e-mail]
-Thank you
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HP 564 – POOR PRINT QUALITY (SEVERE) – PRINTHEAD CLEANING/REPLACEMENT
Providing you have already adhered to the general guidance outlined on the 'HP 564 Cartridge Errors'
page, it sounds like ink is not being properly delivered into and/or fired thru the PRINTHEAD assembly,
or a portion of the PRINTHEAD ink port has dried out, which is leading to the poor image quality, or lack
thereof, you are observing*. http://inkjet411.com/?page_id=1925
To verify the PRINTHEAD is electrically ok, please activate the 'Tap 41' PRINTHEAD Health Diagnostics:
1. Access the Service Menu (several different methods depending on printer model); the
‘Support/Manufacturing’ menu (or similar) will be displayed if entry is successful
a. Press ‘Return’ and ‘Home’ buttons in an alternating sequence (i.e. 4-5 times)
This is a bit tricky. See 3rd video here for guidance: http://inkjet411.com/?page_id=434
........or......
b. Press ‘Down’ arrow, press ‘Cancel’, then press the ‘Return’ button:
2. At the ‘Support’ menu, use arrow key to navigate to the ‘Service Menu’, press Ok.
3. Use arrow keys to advance to the ‘Special Reports’ Menu. Select OK.
4. Use arrow keys to advance to the ‘print mech button tap’ menu. Select Ok.
5. ‘Code = 0’ will be displayed. Use arrows keys to change value to ‘41’ (i.e. press and hold right
arrow key).