Technical information

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There is no ‘lock-out’ feature on the HP 940 ink series printer models to our knowledge...you should be
able to resume normal printer operations. If not, please let us know the 'exact language' of the error
message you are observing and for which ink cartridge (Cyan, Magenta, Yellow, Black).
NOTE 2: HP does not allow an automatic reset of the electronic chip on the cartridge after a refill, so the
ink level indicator is sending a false message that the ink level is low. Your cartridge is not low on ink,
and nothing is wrong with your printer or cartridges. The ink level indicator usually cannot be manually
re-set, so the ink level indicator is often not usable. For more information on this, click here:
http://inkjet411.com/?page_id=1423
However, losing this feature is not necessarily significant, because the ink level indicator usually has
substantial usable ink remaining when it shows "low on ink". Therefore, the warning has limited value,
because customers who prematurely replace their cartridges when they see the "low ink" message are
wasting a lot of residual ink. In order to use as much available ink as possible, many customers (not only
those who refill their cartridges, but many who have not yet tried refilling) always ignore the ink level
indicator "low" warning, and wait to replace or refill the cartridge until immediately after seeing ink
begin to fade on their printouts.
Many customers who disregard the low ink indicator keep a spare set of cartridges so that their printing
productivity is not disrupted when the cartridge runs out of ink. If the cartridge completely runs out of
ink and continues to be used when it is dry, this could damage the cartridge, so customers should
promptly refill their cartridge when the ink begins to fade. This fading process is gradual, so that y ou will
have sufficient time to refill the cartridge before the risk of empty cartridge printing. In summary, most
refill customers agree that the huge savings of refilling is much greater than the potential loss of the low
ink indicator feature.
On the other hand, if you observe Red X's (i.e. "unrecognized cartridge"/ "incompatible printhead"/ "ink
system has failed") on your printer display panel or Window's popup, then this is a different type of
error (i.e. possible cartridge connection issue or failure of permanent printhead assembly). For advanced
printer diagnostics, please refer to .pdf file at the following link:
http://inkjet411.com/?page_id=1813
To provide additional insight on how the semi-permanent PRINTHEAD works in your printer, please refer
to video at the following support page: http://inkjet411.com/?page_id=2054
For any additional questions please contact us directly: [e-mail]
-Thank you
CANON 30-241 ERROR MESSAGE (GENERAL)
Canon PIXMA MP240, MP250, MP260, MP270, MP280, MP480, MP490, MP495
Regarding your recent inquiry about the refilled Canon PGI-40 black ink cartridge ink alert/error
condition, you will need to reset the cartridge low ink level monitoring in order to clear the ink level
alarm condition*.