HP Photosmart C4780: Photosmart printer keeps going offline

HP Photosmart C4780 randomly disconnects.  I connect the printer cable to my Macbook Air running OS X Mavericks. (It allows to print wirelessly, but I had so much trouble now 'online' I dropped and now just plug in when I need to print.) Printer will connect and print for months in a row, then all of a sudden he's going 'offline' and I can't do online. I restarted the laptop and printer but did not help.  Why he continue offline... and how I get it online? THX

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Tags: HP Printers

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