I use an HP21 cartridge, and refill myself. I lost the info on resetting the chip within the cartridge (to fool the printer into thinking that you have inserted a new cartridge, and showing the proper ink level onscreen). It is a process with tape and inserting the cartridge into the printer several times and rebooting once. I just CAN'T remember the process! Any help would be greatly appreciated.Resetting the chip on an HP21 print cartridge?
Try this website, I haven't tried it myself but they seem to know what they are talking about
http://www.247ink.com/hp21_refill_instructions.htmResetting the chip on an HP21 print cartridge?
contrary to the prior poster, there is such a process. it involves taping those upper outermost contacts (one on each side). i don't have the instructions in front of me though, so i can't recall the details.
you might google 'island inkjet help desk'. that website (the third or fourth search item returned) might have the actual instructions on it, but i am not 100% sure of that.
good luck :)
There is no such process available. Some one might have done it by just trial and error and was successful incidentally. Also it may not be healthy for your printer in long term. Ask HP directly - it may be unethical too.
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