Technical information

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d. Using a lint-free towel, remove water from rear/bottom electrical contacts. Ensure

printhead electrical contacts and exposed surfaces are fully dry.

e. Install the printhead into the printer. You may observe a “Replace Printhead message” so

you will need to cycle printer power by turning printer off and then on to clear the error.

f. Install ink cartridges and retest printer. You should observe a New PRINTHEAD alert

message followed by an approx. 4-minute preparation countdown prompt.

g. If permissible, activate the ‘Clean Printhead’. This can be done from the printer’s control

panel or software printer driver (for example, by selecting ‘Tools’ – ‘Clean Printhead’, or

similar).

h. If you have reached this point of the troubleshooting and all the previous troubleshooting

steps did not work, then the printhead is likely damaged or at end of life* and may need to

be replaced.

3) Replace the PRINTHEAD (it is suggested to refer to HP’s Procedure)

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01643079&lc=en&cc=us&dlc=en

4) As an outside chance, the internal suction pump might be faulty = new printer unfortunately. Best to

troubleshoot this with HP personnel if that is the case. Run a 'Tap 21' test (using same/1st procedure

provided above to test).

*Ink cartridges are merely plastic holding tanks for the ink....other than connecting and being recognized

by the printhead, there isn't really anything that can go wrong here (Costco ink formulations and HP ink

formulations are 'very' similar, both are based on a dye ink based formulation, so this is not a significant

contributor toward this type of condition based on our internal testing).

*Typically the printhead should not reach its end-of-life until after a minimum of 8 or more complete sets of cartri dge

changes; officejet models typically have a higher print page throughput average, but this is not always the case. While

some printheads may l ast 12,000+ pages others may only l ast 2000 pa ges, actual results will vary. The printhead will

eventually fa il i n time due to an internal micro-electronics failure, due to the following leading factors: adverse

customer printer usage/ care, printer duty cycl e (i.e. # pages printed per month), printing frequency (i.e. time

between each print job), print mode (i.e. draft vs. normal) a nd content printed (i.e. photos vs plain pages) and color

mode (black and white only vs. color/greyscale printing). Pa per types used (i.e. plain paper, photo papers &

matte/heavy bond papers) and paper edge curl (i.e. duration i n printer and/or exposure to low relative humidity) can

also quickly lead to premature printhead failures due to physical ‘head strikes’ of the paper edges making repeated

contact wi th the printhead nozzle plate surfaces.

NOTE: For more severe PRINTER error messages which prevent printing altogether [i.e. “Incompatible

Printhead" or “Ink System Failure”] this is typical of failed micro-electronics within the PRINTHEAD

assembly (nothing to do with the HP 564 refilled ink cartridges). The PRINTHEAD assembly is a separate

electronic unit in which the cartridges plug into and feed ink to and is essentially the heart of the

printing system. For reference, here is how the PRINTHEAD works: http://inkjet411.com/?page_id=2054