I have a tom tom 720 after connecting it to my computer. it will not turn on a white cross in a red circle keeps flashing

Internal memory was damaged when dropped.. OR the SD card if it has one. Replace the sd card and copy data over from back up

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.

http://www.tomtom.com/support/index.php?Language=1&query=red+cross&FID=1898

Red cross issue:
http://www.tomtom.com/support/index.php?Language=1&query=red+cross&FID=1898

Red cross issue:
http://www.tomtom.com/support/index.php?Language=1&query=red+cross&FID=1898

Device not recognised by PC:
http://www.tomtom.com/support/index.php?Language=1&query=connect+to+home&FID=7375

Device not recognised by TomTom Home:
http://www.tomtom.com/support/index.php?Language=1&query=connect+to+home&FID=7375

http://www.tomtom.com/support/index.php?Language=1&query=red+cross&FID=1898

Hi - have had the same problem - if you look on the tomtom website and support they have a list and one is flashing red cross. You need to follow the steps to format the tomtom. I did this and it worked and it included the update. i havent reconnected since i have it working now. I think its a software problem with HOME. Make sure you do a back up on home and make sure you follow step by step. close HOME before you start to reformat and also in the preferences turn off the automatically connect to home when you plug into your computer or it keeps flashing up on the screen to correct. the only solution is to format it. i bought mine two days ago and the first one stuffed up so took it back for a replacement. this one worked when i turned it on but turned out the flashing cross appeared when connected to computer (i have a mac). good luck

You have to make a manual back up of the device. Make a new folder on your desk top. Connect your device to your PC and turn it on. Go to my computer and look for tom tom storage device and open it. You will see all the folders that is in your tom tom. Copy and paste just the yellow ones into the new folder. When you have done this you can know reformat your device. Do this by right clicking on the tom tom logo (in my computer). Click fat 32 (full format). This will wipe everything off. Disconnect your device, you will see a red cross on the screen. reset the device with a paper clip (hold in for 30 sec) You will still see the red cross. connect back up to PC and install the latest application of to tom home on to the device. From here you can go to add maps ect, and put your maps back on the device. Tom tom home will give you all the updates your device will be missing. You will only need the maps so don't worry if you can not copy all folders (for whatever reason) you can get everything you need as well as free updates for free via tom tom home. Its only the maps you have to pay for.

I have exactly the same problem. Everything worked fine until I did a software upgrade. I have tried the reset suggestion but it has not fixed the problem. I have been told that a possible solution is to install the version of the OS that was there prior to the upgrade but I cannot find this anywhere

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