I have a tomtom 4n00.004.2 when I turn it on it shows the SD icon with a red x over it and it will not allow me to do anything else to it ..what does that mean

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.

If you have an SD card installed then
Remove the SD card from the tomtom
The card may need to be formatted properly first or re-formatted.
Formatting is better done in a card reader.
There are differing views but this method has always worked for me.
Insert the card in the reader,. Using my computer or windows explorer right click on it and select format
select FAT32 as the files system
Now connect the tomtom to the pc but don't let tomtom home run.
Exit TomTom Home if need be.
You now need to select your tom tom which will also show as a drive and may even show its own special icon.
In windows explorer select tools then folder options.
Click view and tick the box for "show hidden files and folders"
It may warn you but you can ignore it.
then just copy ALL the files from the tom tom to your sd card.
DO NOT USE CUT AND PASTE !
Once all the files are on your new card switch off the tom tom and insert the sd card and re-boot the TomTom
It should now work.
If not try the hard re-set in which you would use a paperclip to reset the tomtom. there should be a tiny hole on the underside of the unti.
push the paperclip in there (not too hard) while the unit is switched on
This would cause a reset to factory defaults (you may have to set home location etc)
You may also have to switch off and re-boot again for it to take effect.

If you have an SD card installed then
Remove the SD card from the tomtom

The card may need to be formatted properly first or re-formatted.
Formatting is better done in a card reader.

There are differing views but this method has always worked for me.
Insert the card in the reader,.

Using my computer or windows explorer right click on it and select format

select FAT32 as the files system

Now connect the tomtom to the pc but don't let tomtom home run.
Exit TomTom Home if need be.

You now need to select your tom tom which will also show as a drive and may even show its own special icon.

In windows explorer select tools then folder options.
Click view and tick the box for "show hidden files and folders"
It may warn you but you can ignore it.

Then just copy ALL the files from the tom tom to your sd card.

DO NOT USE CUT AND PASTE !

Once all the files are on your new card switch off the tom tom and insert the sd card and re-boot the TomTom

It should now work.

If not try the hard re-set in which you would use a paperclip to reset the tomtom. there should be a tiny hole on the underside of the unti.
push the paperclip in there (not too hard) while the unit is switched on
This would cause a reset to factory defaults (you may have to set home location etc)

You may also have to switch off and re-boot again for it to take effect.

Remove the SD card

The card needs to be formatted properly first that's all,

formatting is better done in a card reader.

Right click on it and select format select FAT32 as the files system

Now connect the tomtom but don't let tomtom home run. exit TTH if need be.

You now ned to select your tom tom which will also show as a drive.

In windows explorer select tools then folder options. Click view and tick the box for "show hidden files and folders"
It may warn you but you can ignore it.

then just copy ALL the files from the tom tom to your sd card

DO NOT USE CUT AND PASTE !

Once all the files are on switch off the tom tom and insert the sd card

It should now work

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

no that will not work see pullin the sd card out of the tomtom kinda pisses off the application if u have the red x error first do the soft reset if that does not work then update ur tomtom an application should pull thru as a download if not dont fret on tomtom home go to show contents on my one then delete just the application and i mean just the application then go back and hit update my one it will download and install new app and boom baby all done

your device may be looking on the SDcard inside. You should not remove the card if you device is powered on, it may wipe the card and make it unuseable! Instead, also allow a short time before you remove the SD after you power it down aswell. As is for all SDcards when you need to remove it.

Unfortunalty , you have missing , corrupted or damaged files on your SD card. if you backed up your SD card earlier to a PC , then format and reinstall them to your TomTom SD card.

good luck

Hi,

You need to put the File / files associated with the voice onto your SD card in the Voices folder.

Use an SD card reader and your PC to look on the TomTom SD card. Find the folder called "VOICES". Copy the John Cleese voice files into the "VOICES" folder.

Once this is done put the SD card back in your TomTom. Switch on. When the TomTom starts up , tap the screen and select "Preferences" , then move through Preferences until you find "Lips" icon and under that it will say " Change Voice" . Tap the Lips Icon , then move right or left until you find the required / John Cleese Voice and select that. Your Tom Tom should now give directions with the John Cleese voice.

Please note: Some voices that you can download free of the internet can contain viruses or if you are unlucky they can contain faulty data which can effect the workings of your TomTom.
As a precaution , before you copy or alter or add anything to your TomTom SD card you should make a Backup of your SD card onto a PC. The if anything gets upset on your SD card you can always format it and restore the origonal data.

Good Luck.

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