HP Photosmart C4780 All-in-One Printer support
Replacing Ink Cartridges
Video of replacing a cartridge
The following video demonstrates how to replace a cartridge.
If you have trouble viewing the video or to view the video in a different size, click here to play the video on YouTube .
Other solutions customers found helpful
HP Photosmart C4600 and C4700 All-in-One Printer Series -- A 'Cartridge Problem,' 'Cartridge Failed,' or 'Incompatible Cartridge' Error Message Displays on the Computer
More for this product
HP Support forums
Find solutions and collaborate with others on the HP Support Forum