Question about HP DeskJet 3940 InkJet Photo Printer
Try unplugging ALL power and USB cables. ESPECIALLY IMPORTANT... Unplug the USB cable from the back of the computer.
Then power down your computer and start it up again.
This worked for me last year when I had the problem you are having.
Posted on Feb 04, 2008
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Posted on Jan 02, 2017
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