Question about HP DeskJet 840c InkJet Printer
How to check whether the black ink cartidge is defectiveafter it was refilled
If its defective it wouldnt print or you would get an error message. If you are having quality concerns then the print head is probably clogged. Nothing you can do except replace the cartridge because it has the print head built into it.
Posted on Oct 05, 2009
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Posted on Jan 02, 2017
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