Hi, I purchased a rebuilt 1490T a few months back and during a rescent trip to CA this unit has rebooted 4 times while navigating, all on its own. It also rebooted a couple more times during another 3 day trip. To all you Garmin owners .. is this number of reboots unusual or should I attempt to get a warranty replacement. I am beggining to suspect that perhaps the reboot issue is the reason this unit was returned in the first place. Thanks to all