I had the same problem...I contacted Technical Support at TomTom and found out the following: I had purchased my unit through Dell and there seems to be a lot of calls in to them to get it going. It IS possible to get it working again.
This is a copy of the message I received from Technical Support...it does include formatting the drive...you will need to back up your maps...
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.
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Look up Tom Tom directly on the Internet and download the latest Tom Tom "Home" program. Make sure the Tom Tom you are using is the one that was originally set up to your account. If you have bought a new Tom Tom, it wont work until you have registered the new device. I had the same problem. I replaced an old Tom Tom with a new one and my old account wouldn't work as it kept saying the devices were not the same and that my email details were already in use for another unit.. I had to email Tom Tom to correct the account details.
1-Your tom tom does not have the device driver needed to connect to your phone? 2- Turn off the bluetooth device the tom tom is a bluetooth device and the two of them are probably arguing the tom tom and your actual bluetooth. 3- You have to put the tom tom in discover mode and let the PHONE find the tom tom then the tom tom should find the phone, once this happens you enter the code and tell the phone that this is a trusted device. The same thing that was done with your actual bluetooth device. Hope this helps
If you search for "TomTom turns itself on", you will find that there appears to be a problem which TomTom will not acknowledge. Mine always turns itself back on exactly (to the minute) one week after being switched off and runs the battery down. Tomtom have got me to reformat and had it back for repair but the problem remains
That means you didn't let TomTom Home finish your update before you disconnected. You can do one of two things: reconnect update your device, but if that fails to work, you're going to need to do a hard reset of the device. It is very important to allow TomTom Home to completely finish installing any updates you select before disconnecting or the software may become corrupt.
If you have TomTom that have the slot for SD card, then it should accepted the SD card. The instruction for how to use the SD card is simple, but it is hidden in the TomTom Home, that's why it's difficult to find it. Below are the instruction how to use the SD card.
1. Format the SD card (FAT32) and do not stick the SD in the slot yet
2. Run Backup (connect TomTom device to computer)
3. Disconnect TomTom from computer and turn off
4. Slide the SD into the slot and connect TomTom back to computer (choose "yes")
5. In the TomTom Home menu, Choosen Backup & Restore >>> and choosen Restore
TomTom Home will add all applications to the SD card. So the internal memory still have the applications and the SD card also had the same applications. Everytime you slide the card in, TomTom will automatic detect and use it as its primary storage, if it not detect, you can go to the device menu and pick the device to connect to.
Whenver you take the SD card out, then TomTom will use its internal memory.
I had this problem (waiting for a valid GPS signal). I did a factory reset and the unit started working
again (yes, I lost all my settings, but what good is a GPS unit that
just sits there waiting for a valid GPS signal?). To do a factory
reset, go to menu -> change preferences -> Reset factory