The following video demonstrates how to replace a cartridge.
Replacing a Cartridge - HP Photosmart C4795 All-in-One Printer
Learn how to replace a cartridge in the HP Photosmart C4635, C4640, C4650, C4680, C4683, C4685, C4688, C4740, C4750, C4780, C4783, or C4788 All-in-One printer. The model shown is the HP Photosmart C4795 All-in-One Printer.
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