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HP Recommended
HP officejet 6600

Error message is as follows:  The printhead appears to be missing, not detected  or incorrectly installed.  my only options are the Show me button which I can't click and the question mark on the left of the screen.  I click on the question mark and it shows me 4 options... 1) reinstall the printheads, 2) clean the electrical contacts, 3) replace the printheads,  4) contact HP support.  It was working fine a few days but all of a sudden it stopped.  Any help would be greatly appreciated.  My ink cartridge unit does NOT have the latch on the right side. 

 

Update:  I went ahead and removed the ink cartridges, unplugged power, and sprayed QD contact cleaner on the contact points of the ink cradle, with a paper towel under the cradle.  Put my timer on 1 hour, ink was on the paper towel.  So i was assuming anything that was clogged was coming out.  After my timer went off, I plugged it in all excited and NOTHING.  Same message.  I will try it one more time for another hour.  If I get the same message, I will literally give up!  

 

Thank you.

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