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Instructions for ink replacement, Cleaning and refilling the Q5942A Cartridge HP 4250 / 4350 printer - YouTube
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Amazon.com: HP 42A Black Toner Cartridge | Works with HP LaserJet 4240, 4250, 4350 Series | Q5942A : Office Products
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Amazon.com: LD Products Compatible Toner Cartridge Replacement for HP 42X Q5942X High Yield (Black) for use in HP Laserjet / Multifunction Printers 4250, 4250tn, 4350n, 4250dtn, 4350, 4350tn, 4250dtnsl, 4350dtn : Office Products
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