Wrong country! Hope you can help. Was driving into central London one day when my TomTom just switched itself off! I kept trying to plug in the destination postcode but it would not recognise it. Now when I try my Surrey GU postcodes it directs me to Guam in SE Asia!! I can't get it back to recognising a UK postcode!! What do I do!! Help!!

It may help to do an update on your item to fix any problems.
You'll need to download the tomtom home software, which should guide you through the process.
You can download the software from Tomtom.com at the following address:
http://www.tomtom.com/services/service.php?id=16
Hope this helps.

Connect it to the dock and your PC usb. Go to my computer and copy all of the files in the removable disk that appears when you plug it in. Save them to a safe place on your computer.
Go to http://www.tomtom.com/ click 'Support' where you will find repair tools and guides. If anything goes wrong then copy and paste your backed up files back into the removable drive and overwrite.
Please rate if this helped you.
Regards

Phill

If you updated the operating system, and you are having this problem then something went wrong with the update. Hope you made a backup before you updated. If you did not, connect your 910 to the pc and then go to "My Computer" and open the drive for your 910. Delete "ttsystem". Now open TomTom Home and let TomTom Home install the operating system for your 910.

yep, possibly slipped a cog ( metaphorically)

try resetting the BAUD rate and the PORT in settings. can happen if some electrical interference was experienced ( UFO?)

Connect it to your computer (green light should be on) and hold down the power button for at least 15 seconds to reset it. Let go of the power button once the device reboots. Run HOME (www.tomtom.com/home) and download/install any updates that it finds. 

Be sure that you have the Tom Tom turned on. Also, if you have it plugged into a front USB port on your computer, try connecting it to one on the back. I hope this helps.

The power cord connects to a little circuit board inside the case, and the hard drive itself connects to the board. I would think that if you damaged anything it would be the board but not the drive. You could try taking the drive out of the case and connecting it directly to your computer (or you could get a computer shop or computer geek friend to do it if you don't feel up to it). If the drive itself isn't damaged you will be able to read your data.

I have a Tomtom One but can get no where on it as I put in the wrong country. I need a way to chanbe the country to USA please.

PUT A NEW P.C BOARD

Hi all,
I got the following response to this little problem. Will try it out and hopefully my 520 will work again soon.

To ensure that your device is correctly connected to your PC, please do the following:-

STEP 1 Run the Registry Cleaner Tool

• Disconnect the TomTom and remove any USB devices from your PC, If you use a USB Hub, please disconnect that also.
• Run the RemoveRegEntries tool. You can download it from :-http://tomtom.com/lib/img/cs/S4S/files/RemoveRegEntries_TTGOv1.exe
A Black window will appear briefly then close.
• Make sure that you have got Administrator rights on the PC. Otherwise you may not be allowed to connect new hardware (especially the case when using office computers)
• Reboot your PC

STEP 2 Connect the TomTom

• Make sure the device is fully charged before connecting it to the computer. Ideally a mininum of 4 hours charge.
• Reset the device using a paper clip (see http://www.tomtom.com/6965). When resetting, keep the reset button pushed in for at least 20 seconds, but DO NOT turn the device back on just yet.
• Ensure that your TomTom has power connected to it. There should be a green light on the TomTom unit. If your device came with a Home Charger, please make sure that is plugged in to the TomTom also.
• Connect the TomTom to a USB port on the back of your PC. We strongly suggest that you use a USB 2.0 port and not a USB 1.1 Port. (USB 2.0 ports are faster USB ports, which are standard on all modern PC's, older PC's and some laptops may still use USB 1.1 ports which are slower and can prevent some USB devices from connecting properly).

STEP 3 Switch the TomTom On.

• On your PC, open My Computer
• Now switch the TomTom On while it is connected to the PC with the green light on.
• Look at My Computer, do any disk drives appear as you switch the TomTom On? If so, which drive letter is it?
• Double click on the TomTom disk.
• What files and yellow folders do you see?, please make a note of them and reply back with what files and yellow folders you see. If possible, please provide us with a screenshot showing all the details.

If the device is NOT listed as a 'Removable drive' under 'My Computer' when you switch the TomTom On, try the following:-

STEP 4 Check Device Manager

• Disconnect the TomTom from the computer.
• It is likely that you have a Firewall on your PC, in some cases, Firewalls can prevent USB devices from being recognized by the PC. We suggest configuring your Firewall and security settings to allow all USB devices to connect to your PC. Once you have done this, we suggest trying the steps above again.
• Go to 'Start' and right-click on 'My Computer' and select 'Properties'
• Select the 'Hardware' tab
• Expand 'Disk drives'. If the TomTom device is shown there with a red cross, right-click on it and select 'Enable'
• Check under 'My Computer' to see if the device now shows up as a 'Removable drive'.

We also suggest it is a good idea to try to connect your TomTom to another PC to see if you get the same problem.