Question about HP DeskJet 840c InkJet Printer
Look for the manual and look if there is a way to reset the gadget. one way is to push the button before plugging the unit while pushing the power button, release the button then press again, this may not work for HP. Another thing is that the waste ink absorber may be full or clogged from using refill ink not used by HP, so you need to clean the waste ink reservoir. This is not an easy job but may work fine.
Posted on Feb 09, 2008
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Posted on Jan 02, 2017
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