How do you change ink cartridge in hp deskjet 940c?

Answer 1

Although not all HP cartridge adhere to exactly the same ink refilling procedure here is one that may be indicative. For details regarding your cartridge you can see the published (but copyrighted) instructions at printer refilling sites like Inkfilling.com For color cartridge, you need 3 syringe (5ml needle) for each color. You also need to buy bulk ink for your specific printer model if you choose to print photos, but for plain text and graphics print, a universal hp ink will do. Usually introductory color cartridge refills at 1.5ml per color. For 10ml cartridge, refill at 3ml per color. Use a tissue to pat the portion of the cartridge where the ink goes out. Determine where the color's position are. the holes for each color are approximately at the following: red : center top / yellow : left midway / blue : right midway. try to check the location of the holes first (you need not remove the HP label on top. punch the label with the needle intended for each color, if it goes through then you've hit the spot. push the needle as far to the bottom then inject the ink. As in medicine, make sure the syringe has no more air inside only ink.

Answer 2

It's really pretty simple once you know how. Open the front end. The cartridges go all the way to the right. Press down on the cartridge itself, and it will release from the carriage. Reverse procedure with new cartridge.