Technical information

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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

Otherwise, please advise if a no-printing error condition persists. For any additional questions please

-Thank you

HP 940 - UNAUTHORIZED / FRAUD INK MESSAGE / LOW INK

Regarding your recent inquiry about the HP 940XL cartridge's 'LOW INK' or 'EMPTY INK' messages,

“Empty” and “Low Ink” alerts are COMPLETELY NORMAL for all HP 940 / 940XL ink cartridges which have

been refilled! While at first this may be an unusual workflow, it does allow print operations to proceed.

The ink level monitoring feature cannot be reset since only brand new HP ink cartridges support ink level

monitoring.

As you just returned from the refill store, your ink cartridge(s) is full of ink - you may ignore low ink

warnings (along with any other nuisance message) and print normally until you observe one of the

colors to begin to fade. When you do observe print fade, run a quick 'test print' (from printer's

TOOLS/MAINTENANCE menu), to see which color is out and then bring that cartridge, or cartridges, in

for refilling.

Please watch video at the following link which explains normal operation when using refilled ink

cartridges: http://inkjet411.com/?page_id=2317

NOTE 1: In addition to “Low Ink” alerts, for "Unauthorized ink", "Non-HP ink", "Fraud", "Counterfeit ink"

or similar messages, you may ignore/dismiss this message by pressing 'OK' once for each cartridge, so

that the printer resumes its normal operation. We suggest you do this at the printer's control panel

immediately following ink cartridge(s) installation. For more information on this, please visit:

http://inkjet411.com/?page_id=1423

Now, if you observe missing colors or poor image quality then air may have been accidentally ingested

into the ink lines between the cartridge(s) and PRINTHEAD. To recover from this problem, you will have

to run the "Clean Printhead" procedure 1-2 times to recover the ink system. Watch the video on the HP

support page which describes some of the common issues you may encounter with refilled ink

cartridges. This type of problem is common and completely recoverable.

http://inkjet411.com/?page_id=1457