Topic: Proper Care and Transport of Portable Printers
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Answers to Common Questions
How do I fix my HP DeskJet 340 series printer's portable sheet fe...
Remove the portable sheet feeder and print a self-test (using the manual feed slot on the rear of the printer). NOTE: If the paper does not feed from the manual feed slot, verify that it meets the media specifications for the printer (16-24... Read More »
Source: http://www.uktsupport.co.uk/hp/faq/dj340cbi.htm