Tomtom one y need help

If your TomTom shows a red cross, it means the device is not able to load the software to be able to operate. Some devices have this software on a SD-card, some have it stored on an internal memory.
If there was a SD-card in your TomTom, I would suggest to put it back. If there is a empty SD-slot on your device, it could be you lost your SD-card, but some TomTom devices have an internal memory AND a SD-slot for memory extension, so if you have an empty cardslot it doesn't necessarily mean there has to be a card in it.

When you never saw a SD-card, probably some data went corrupt on the internal memory. When you have a SD-card, probably some data got corrupted on the SD-card.

To repair the software, you need to connect your GPS to your PC or Mac with a USB cable.
You also need the program TomTom HOME. You can download it for free on the TomTom website.
With TomTom HOME you can update the operating system of your device for free (map updates are nor free).

Try updating, and see if your device works again.

If this doesn't work, post it here.

Hi,

Go to TomTom Home reconnect and then go to device on the tool bar. Select disconnect device and this should free up your device and take the red X off.

Goodluck,
Please don't forget to rate my solution

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

If your navigation device shows only the start-up image or you see a flashing cross after you switch it on, it means that the TomTom application is not installed or cannot be found.

1. Connect your navigation device to your computer.
   
   
2. Reset your navigation device.
   
   TomTom HOME starts.
   
   
3. If HOME offers a new application, click Back.
   
   
4. Delete the TomTom application from your device and computer by clicking Manage my navigation device.
   
   
5. Reinstall the application by clicking Update my device.
   
   
6. Safely disconnect your device.

Have you tried reformatting your memory card? Does your computer recognize your card if you plug in the card directly to your computer? You can also try a different memory card if the other solution doesn't work. REFORMATTING WILL ERASE THE CONTENTS OF CARD JUST SO YOU KNOW!

Try taking the memory card out and giving the contacts a quick clean with a lint free cloth

This problem is due to the memory card not containing the TomTom application or map. To update the application onto the memory card, Connect the device to your computer. Open the TomTom Home application. Click on 'Update My Device'. This should then install the application onto the SD card. Alternativly, you could perform all the steps above without the SD card in the device, this will install the application onto the internal memory. Note: you may also need to install your maps, voices, etc after you updat.

This problem is due to the memory card not containing the TomTom application or map. To update the application onto the memory card, Connect the device to your computer. Open the TomTom Home application. Click on 'Update My Device'. This should then install the application onto the SD card. Alternativly, you could perform all the steps above without the SD card in the device, this will install the application onto the internal memory. Note: you may also need to install your maps, voices, etc after you update.

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

Before all, make a backup of device thrugh explorer or similar.

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

longer down on the page, you will find:

What if the device still doesn't start?

If your device still only shows a cross after you turn it on, try formatting the internal memory or memory card of your device.
Please follow instructions carefully...