Corrupted tomtom one memory card

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.

It appears the (TomTom navigation) software may have been corrupted. Try to restore your backup files on to your TomTom device, and see if it will work better.

Hi! I've just finishing dealing with this on my Go720.
Symptoms - freezes during startup and can not turn off.
Tried resetting - but this only turns the unit off. When it tries to restart it still freezes during startup sequence.
So - connected to PC and ran TomTom HOME2. I had backed the unit up only a few month previous, so I tried to do this. However, it threw an error on this procedure. I then thought that perhaps I could erase the memory contents and reinstall the contents of my backup folder. However, playing safe, I first wanted to do a dump of all my files on the units internal memory. Halfway through this I had an error message saying that one file was corrupt and could not be read. The file was clmdata. So ... after more researching the web I read that the file clmdata has been blamed for this freezing problem. I examined my Go720 internal memory and tried to overwrite the corrupt clmdata with the one from my backup set. That failed as the file was corrupt. In windows explorer then deleted the clmdata file but all this did was generate a file of 0 bytes with the original name. However, I now tried again to restore the unit with TomTom HOME, and this time it worked. Unit is fine now! From what I've read, you may not need to use the restore function, but just delete (or try to delete) the clmdata file, and the unit recreates it when it restarts. Best of luck!
Jeremy

download tomtom home install it , run it then connect your device and restore it using a backup

If you have a big red circle with a white X in it, it usually means that your TomTom One 'disk' is corrupted: first try a 'hard reset' , while the power is on, stick a small (tooth) stick through the hole under your unit base and opposite to were the USB connector go, for a few seconds, remove the pressur on the stick will cause a complete system reboot if possible.

Next, since you can connect to the computer, use Windows Explorer -> Properties -> Tools > Error-checking to scan and repair any problem with your Tomtom drive & check if you still have a problem.

If there is an error or you cannot reboot, hopefully you have a backup made either by copying the whole unit disk content or more traditionally via TomTom Home, I would suggest a complete restore your device content follow by a TomTom Home device update.

Hope it helps: let me know how you go.

lost card

you might want to try:

-- plug to the electrical charger, reset for 15+ secs
-- connect to the computer, download Tomtom app and try updating the application

I had a 2006 purchased go 700 and did the above and it is working much better with latest application.

The DATA on your SD card has become corrupt or the SD card itself has become damaged / faulty. ..... Hopefully , some time back , you backed up your SD card to your computer ? . All you need do is format the card and then reload the files from your PC . If the tomtom still doesnt load up then you would need to purchase a NEW BLANK SD card and reload your backup onto it. If that doesnt solve your problem and if unfortunatly you didn't back up the original card then you will need to purchase a NEW TOMTOM SD card with activation code . Bad news and a learning process , always back up your tomtom card !

When on test or demo , the tomtom runs on a demo menue list loaded onto the sd card. if the data file on this list is corrupted the tomtom will only complete the demo journey up to the corrupted point in the list. I would suggest that you reload your backup onto your SD card . ( Hopefully you did make a backup to your PC ? ). Other than that , you could try contacting tomtom and ask them which file you need to replace on your SD card in order to replace the corrupted file. You could then either download it from tomtom website or copy it from someone elses tomtom SD card.

The most likely cause for the RED CROSS is that some files are missing or corrupted on the SD card. This can also occur if someone has accidently dragged and dropped files on the SD card. ie. if a folder or file has been accidently dropped into a different folder. For instance you could drag and drop the maps folder into the voices folder. In this case the unit wouldn't load up if you had no maps although the maps would still be on the SD card but would be in the wrong place. We all know that files on media can be damaged or become corrupted so its always worth making a GOOD BACKUP of any sd card so that should this problem arise you can reinstall the backup.
If you have no luck with your SD card , you could try borrowing a card off someone you know and make a copy of it then activate that copy by using the original activation code together with the device code. .... good luck .