Try this:
1. Hold the on/off button until it reaches the info screen (where info related to the device is displayed);
2. After entering the info screen press the on/off button 3 times quickly, it should be 3 presses within one second);
3. The device restarts and only shows a cogwheel, it just entered in the 'recovery mode';
4. Make sure to connect the TomTom device to the computer (so it can download the 'last known good application' for your device);
5. Wait for a moment -- wait until you see picture of a TomTom (red x) and a laptop -- then switch off the TomTom unit;
6. Then reset the device, the device should start up normally;
7. Wait 5 minutes.
Then you can try this as well, to make sure all up to date:
http://discussions.tomtom.com/t5/TomTom-GO-800-1000-2000-Via/SOLUTION-for-the-GPS-SIGNAL-issue/m-p/2...- Try to disable your antivirus and firewall, use Firefox, and make sure that your computer is not going into stand-by or similar.
- Clear the cache before each update attempt. Also could do a soft reset before and after the update.
- Make sure you have the latest Adobe Flash Player and Java installed.
- Make sure you have all the latest updates and hotfixes/patches to your OS.
- In case the device looks like hung during the update or the counter stopped, just leave it. It will be fine in a few minutes.
- Check your network connections, make sure that the TT's network adapter is enabled
- Try to uninstall and re-install the MyTomTom application