![HP DeskJet 6520, 6620, 6840, 6940, and 6980 Printers - 'Top Cover Open' Message Displays on the Computer | HP® Customer Support HP DeskJet 6520, 6620, 6840, 6940, and 6980 Printers - 'Top Cover Open' Message Displays on the Computer | HP® Customer Support](https://support.hp.com/doc-images/53/c01066394.jpg)
HP DeskJet 6520, 6620, 6840, 6940, and 6980 Printers - 'Top Cover Open' Message Displays on the Computer | HP® Customer Support
![HP DeskJet 6520, 6620, 6840, 6940, and 6980 Printers - 'Top Cover Open' Message Displays on the Computer | HP® Customer Support HP DeskJet 6520, 6620, 6840, 6940, and 6980 Printers - 'Top Cover Open' Message Displays on the Computer | HP® Customer Support](https://support.hp.com/doc-images/823/c01066396.jpg)
HP DeskJet 6520, 6620, 6840, 6940, and 6980 Printers - 'Top Cover Open' Message Displays on the Computer | HP® Customer Support
![HP Deskjet 6830 and 6840 Series Printers - Removing and Installing Print Cartridges | HP® Customer Support HP Deskjet 6830 and 6840 Series Printers - Removing and Installing Print Cartridges | HP® Customer Support](https://support.hp.com/doc-images/42/c00257023.gif)