Question about HP DeskJet 940c InkJet Printer

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Hp ink cartridge replacement

Thank you for your assistance in this matter.
Everytime I replace the ink cartridge when the ink requires replacement the ink does not seem to inject.  Sometimes I restart the system, that does not help.  Sometimes I turn off my computer et al for a day, that does not help. 

I put new cartridge in 2 days ago, still does not work.  As the cartridges do not have instructions for this and the person who owns the hpdeskjet 940c printer is unable to locate the manual to alleviate this problem.  HELP!!!

Sincerely

C. at grayshaverhickey@hotmail.com


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