What does the Ink Alert light indicate on the HP DeskJet Ink Advantage 3700?
The Ink Alert light indicates low ink or cartridge problems. You should check ink levels and inspect your cartridges when this light is illuminated. Estimated ink levels are also shown on the control panel display. (Page 1)
From the official HP Deskjet Ink Advantage 3700 All-in-One Printer manual, page 1
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