Technical information

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HP940 PRINTHEADS have reportedly only functioned for 1100-2000 printed pages (with HP OEM inks),
so reliability results do appear to vary widely.
Please refer to video on how the HP PRINTHEAD functions: http://inkjet411.com/?page_id=2054
We suggest you contact HP for additional troubleshooting help. Replacement PRINTHEAD assemblies
may be ordered from www.HP.com
For any additional questions please contact us directly: [e-mail]
-Thank you
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*Typically the printhead should not reach it’s 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 a lways the
case. While some printheads may last 15,000+ pages others may only last 1000 pages, actual results will va ry. The
printhead will eventually fail in time due to an internal micro-electronics failure, due to the following leading factors:
general customer print usage and printer care, printer duty cycle (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). Paper types used ( i.e. plain paper, photo papers &
matte/heavy bond papers) and paper edge curl (due to age in printer or low relative humidity) can also quickly lead to
premature printhead failures due to physical ‘head strikes’ of the paper edges making repeated contact w ith the
printhead nozzle plate.
HP 932/933 CARTRIDGE SWAP / ACTIVATION & LOW INK WARNINGS
Regarding your HP933 ink cartridge refill inquiry and cartridge error "Depleted cartridges must be
replaced"....you should have been advised that each color must be activated by inserting a ‘spare
cartridge’ into the printer for ~25 seconds (i.e. you MUST have a complete set of spare cartridges to
activate a full set of refilled ink cartridges - these can be empties, starters, or another set of HP932/933
ink tanks)...
Regarding your HP932/933 ink cartridge inquiry over 'low ink' messages, please note that “Depleted”,
“Refilled”, and similar “Ink out” alerts are COMPLETELY NORMAL for HP 932/933 ink cartridges which
have been refilled! While at first this may be an unusual workflow, it does allow print operations to
proceed. Unfortunately you cannot bypass or correct these alert conditions as the embedded smart
chips (at bottom of each ink cartridge) were not replaced during the refill process; there would be
additional costs associated with chip replacement)…