How do I check the ink status and refill if needed on my HP DeskJet 3755?
Press 'Info' button until Ink Levels option is displayed, select it for each cartridge level shown. To get replacement cartridges (HP 65 Black/ Tri-color, or XL variants), visit www.hp.com/go/learnaboutsupplies.
From the official HP Deskjet 3755 All-in-One Printer manual, page 2
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