Canon wireless scanner just went missing; printer still there

Feb 11, 2015
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My Canon MG5420 (wireless printer scanner) was working fine until a few days ago when the scanner portion went away in Yosemite (on MBA 2014). It reappears when I plug the Canon in via USB but disappears again once unplugged. Apple support couldn't help. I've tried resetting the print system, reinstalling drivers, rebooting, and various other things to no avail. The scanner portion is shared by others so leaving it plugged into my MBA is not viable. Any ideas?

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