My tomtom 720 starts but won't go past the start up screen and i can't turn it off unless it is hooked up to my computer also when it starts it tries to load maps but then it goes to the computer hook up mode and then back to the start up mode round and around it goes untill i turn it off and like i said earlier, only when it is hooked up to my computer it will turn off and no other way. Also if on Tomtom Home i select use my tomtom, it says this map cannot be used. It is the same western European map that came with it.

Try to restore the firmware first. If that fails, there may be a motherboard issue. There is a third party tomtom Repair service that will replace the logic board and a tomtom repair guide if you want to replace it yourself, the screen is available on ebay.

Remove the SD card and try to connect to your computer, the 720 maps are in the internal memory and the unit should start. If not try a hard Reset through the "Reset"hole in the case of the GPS. insert a small paper clip to reset the GPS.

hook it to your usb cable to your for a few hours and then try and start it. first with the power button, it that fails try the hard reset..if neither those work, download tomtom home. follow the directions and tomtom home should be able to repair it unless you have internal problems, like a bad usb port on the gps. bill

The TomTom 520 and 720 are the same unit. the differance is the maps. The 520 has maps of the US and the 720 has maps of Europe. Download the free clearflash utility from TomTom and run it a couple of times. This should clear up your problem. Sometimes the mapset config in the map gets full and it has to be cleared.

Google iPmart. You will find everything you need

Here is the cal.txt I used for my 720

929 86 480 75

It is really close to perfect
open a text file put these numbers in save as cal.txt copy this file connect tt to computer go to explorer/aka file manager find tomtom drive and paste it in.
That is it. test it out.

WHEN CONNECTED TO YOR CPU . YOU TOMTOM SCREEN WILL ADK CONNECT TO COMPUTER NO or -YES. TA YES ON YOUR TOM TOM SCREEN.

Bless your cotton Socks crawdaddydoo !!! pressed reset button on GPS unit, Put it back in cradle, turn it on ... ta dah its working again..... Thank you VERY VERY MUCH...

This solution can be used in the following situations:

• The device hangs in the start screen (splash screen )
• An SD-card with a red cross is displayed on the screen
• A picture with a red dot and white cross is displayed
• The device can’t be turned off

If you haven't already done so, please download and Install TomTom Home from http://www.tomtom.com/7602

If you don’t have a full backup of your TomTom yet we advise you to make one before continuing with the steps in this email. You can make a backup by following the steps below:

1. Reset your TomTom device: http://www.tomtom.com/6965 and connect it to your computer.
2. Click on 'Backup and Restore -> Backup' in TomTom Home 2.0
3. Enter a name for the backup and click [OK]
• IMPORTANT: When the software is asking to delete parts from the backup click [NO]

After the backup is made you delete the files from the root directory of the TomTom. Follow the steps below to do this:

1. Reset your TomTom device: http://www.tomtom.com/6965 and connect it to your computer.
2. Open My Computer in Windows, or Finder in Macintosh from your desktop and turn on your TomTom device.
3. On your screen a new removable disk appears, this is your TomTom device, click on the disk to open it.
4. You will see a list of folders and a list of loose files
5. Delete all of the loose files. IMPORTANT: The folders with their content must NOT be deleted.
5. Close the window when all files are deleted by clicking on the [x].

Next we will reinstall the application via TomTom HOME.

1. Start TomTom HOME on your computer
• TomTom Home should automatically check for updates and prompt you to install them, if not:-
2. Click on 'Update my device'. If you get the message 'No Items Available', or there is not an application to download, click on 'Add Maps, Traffic, Voices etc -> Items on my computer', select the application and click on 'Add'.
3. Select the Application update.
4. Click on 'Device -> Disconnect Device', then turn off your device when it is done installing and disconnect it from your computer.
5. On a PC, in the System Tray by the computer clock, click on the 'Safely Remove Hardware' icon and disconnect the TomTom also in this way.

When switching on the device it should boot as normal again.

Hi, I am back, just got the problem solved, I called their tech support at no charge (866-486-6866, Glen) , really good service.
First turn your firewall off (if you have one). You need to go into your 720 with the TomTom Home software and erase the downloaded software (with the remove items from my device) and reset the device (little reset button under the unit keep it pressed for 5 seconds), place it back in the cradle and restart your computer and than restart the 720 , bring the TomTom Home program up, and when the TomTom Home software in your computer restarts and detects the 720 it will tell you that you need to update the application, if it doesn't than you force the update by going to the add maps option, select items on my computer, select applications and press the add button, when done, go back and to device (option in top of your screen) and select disconnect device, restart your 720 and it should be back to life with the upgraded software.
Hope this helps
Aldo