My device will not turn on. It has been charged and when I plug it into the computer the screen on the device shows an computer with a red X to the right of it and a chord that leads to a TomTom device with a red triangle that has an exclamation mark in the center above the word TomTom. This happened when I was trying to update the device. Also, I tried pressing the power button for 30 seconds and that doesn't work. What else can I do? I never had any issues with my XL.