alan kluge 0 Posted January 2, 2012 i have never had a problem with my 721 untill today. my laptop all of a sudden told me that USB not recognized replace device. any ideas? im thinking cable or mother bord Share this post Link to post Share on other sites
top53 53 Posted January 2, 2012 Try upluging and pluging it back in the usb cable and even restarting the computer if that does not work.. Mac or PC? Share this post Link to post Share on other sites
alan kluge 0 Posted January 2, 2012 i have unpluged it a number of times even all day it still does it. pc Share this post Link to post Share on other sites
top53 53 Posted January 2, 2012 Do you have another device you can try from this usb port? Share this post Link to post Share on other sites
