so yesterday i'm creating the route from Whistler to Tuktoyaktuk on my Map62s. things are going well, but I take a little break. when I return to the device the screen is frozen, so I remove the batteries hoping for a total reset. when I re-install the batteries, nothing. fresh batteries, nothing, no screen, no on, nothing . . . this device, and all the others I've had over the years have been bombproof. any ideas, suggestions inmates?