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HP Deskjet 5740 InkJet Printer Questions & Answers
5740 acts like it's printing, but no ink on paper
Since it's trying to print, the printer probably just needs cartridges. The ink can dry in the nozzles with age and disuse and clog them.
Before you splurge on new cartridges, try getting them going. (This assumes there is some ink left in them.) Take the cartridges out of the printer, wet a layer of paper towels about 1/8 inch thick, and whack the nozzles against the wet surface a few times. Check every few whacks to see if you're getting any ink flow. Repeat until you see some ink on the towels and on the nozzles, or until you decide it's futile. Often this dislodges the clogged ink and opens the nozzles, and buys some extra printing time. But you're probably going to want new ones soon anyway.
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