Cant switch it off

I had problems with my unit which I purchased from Dell. This is what Tomtom had to say to me and it worked...my situation was when I connected it to my computer, I was no longer able to have it work correctly. I would press reset and the same thing happened. Here was my solution to the problem: After all maps have been copied to the computer, we can reformat the disk. This is done by entering to My Computer and right clicking on the drive that displays the TomTom. From there, left click on format and choose start (not quick format). In one to two minutes, the disk will be formatted and all files will have deleted. This does mean we will have lost all demos for audiobooks and mp3 player. After doing this, we can copy the map folders back onto the TomTom drive from the desktop. Then, we can open the TomTom HOME program. Once the program reads the TomTom drive, it will check for updates. These updates should include a TomTom program application and voices. We can download these updates and then choose to install them. Once installed, we can then safely remove hardware. The unit should reboot on its own, but we may have to reset the unit if it does not. After doing this, the unit should be in full working order and you should be able to navigate. Just a quick note...in order for the TomTom to work correctly, we must have an application, a map, and at least one voice installed on the hard drive.

Let it run flat then it will work

Exactly the same problem here, don't know what to do