I left my 730 in the glove box for the past week; in very cold weather. I remembered this this morning and brought it in and connected it via its dock to my laptop. (It has the latest maps and the computer has Home 2.7). However the computer no longer recognizes the device i.e Home indicates "No device connected" and Windows Vista gives the message "USB device not recognized". However it appears that with power the 730 works fine i.e. it gets a GPS signal and I can enter a route successfully. Any suggestions? I guess a reset might be in order?