Question about HP Deskjet 6940 InkJet Printer
Installed ink cartridge saying missing or not detected HP Photosmart c4250 all in one replaced the colour cartridge on an HP deskject 6940 (twice because I thought one was faulty). The black one works fine but I can not get the printer to find the colour cartridge (yes, I removed the plastic). After reading a similar issue, I used alcohol to clean the contact points but still no luck. Hate to throw out the machine but I can not put more time or money into it. Dave
Please remove the cartridges from the printer. Take a dry lint free paper towel and gently wipe the contacts on the back of the cartridge (not the bottom from where ink is present). Wipe the contacts inside the printer (on cartridge carrier). Please snap the cartridges back into the cartridge carrier and please try to print a printer self test.
Posted on May 27, 2009
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Posted on Jan 02, 2017
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