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Firs trying wiping the printheads with a small amount of warm water on a cotton swab until no ink comes off on the swab.
If no luck, make sure you are using genuine HP printheads like this one ===> http://amzn.to/1BFFYRx
<=== CLICK HERE
If you are using genuine and new HP printheads but you still get the issue, then the printer is defective, unfortunately. In that case please let me know if the printer is still in warranty.
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