Hi TTF\r\n\r\nI wanted to get a second opinion before I pull the trigger and send my TomTom 540 M back to Dell.\r\n\r\nI`ve taken the unit on a road trip from Toronto to Montreal and then to Quebec City over the past two days. I`m driving in a Honda Accord and have noticed the unit has shut down 5 times now while my wife and I have been driving. It appears as if the unit gets hot on the back since it is mounted on the wind shield and then just shuts off. It will not turn on until I take it off the windshield and wait 5 to 10 minutes while it is out of the sun. Once it turns on I noticed that after I enter the password and it accepts it it re-directs me to the password screen. I have to reboot the system by holding down the power button for 15 seconds and then when I enter the password it lets me get to the main GPS screen.\r\n\r\nTo get to my question, is there any opionions on what is going on here\r\n\r\nWe have a garmin 750 in the other car and it has not shown problems like this. The Garmin is also mounted on the windshield. Note we also have the TOm Tom plugged into the cigarette lighter and the air conditioning is on in the car so I don`t think we are purposefully making the unit hot.