I did find out how to solve the problem. I can't remember exactly where I found the solution but I think it was on TOMTOM website. You have to connect to TOMTOM home and reinstall the application. I put the TOMTOM disc in the computer (which came with purchase) and reinstalled the program. Which I thought was weird as everything appeard to be fine with TOMTOM home). Anyway, it worked. Good luck.
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I will advice you reset the unit, this might help fix the
abnormality with the white screen problem. follow these procedure to
reset your tom tom gps. Make sure your battery is charged before you
begin. TomTom suggested
allowing your device to charge for at least 2 hours before resetting it.
Remove your device's SD card from the card slot. Find the "Reset"
pinhole button on the bottom of the device. Hold the "Reset" button
down for 10 to 15 seconds or until your device
resets itself. You will need a flattened paperclip or another small
metal object to reach inside the pinhole. Power the TomTom back on
and insert your SD Card. You have now reset
your TomTom gps and this should fix the white screen problem.
This means it is not reading the SD card and that it needs to be re-formatted.
This is best done in a card reader and not the tomtom itself.
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
If your TomTom GO/ONE/RIDER is frozen, won’t turn on or does not
behave as it should, it can be fixed by resetting or restarting your
TomTom device. A reset will not delete any data from your device, with the exception of SMS messages on TomTom GO500/700.
your GO/ONE/RIDER to the power charger. If you have a power charger,
use it to power your TomTom GO/ONE/RIDER. If you do not have a power
charger, make sure that the battery in your TomTom GO/ONE is fully
charged. Note: You need to charge your GO/ONE for at least 2 hours using the 12-24V cigarette lighter adapter.
your GO/ONE/RIDER. To reset the unit, you simply have to push a
straightened paper clip (or something similar) into the RESET hole on
On TomTom GO 910/710/510, the RESET hole is located on the bottom of the device.
On TomTom GO 700/500/300, the RESET hole is located on the bottom of the device with the word RESET right next to it.
TomTom ONE, the RESET hole is located on the bottom of the device, with
the word RESET right next to it (just below the SD card slot).
TomTom RIDER, the RESET hole is on the bottom of the device, behind the
SD card door. When opening the SD card door you will see the RESET hole
on the left, right underneath the SD card slot.
Your TomTom GO/ONE/RIDER is now reset. Finally, press and hold the power button for 2 seconds.
I solved this problem by finding an answer on the Tom Tom website. Using a paper clip end insert it on the reset button and press for at least 10 seconds. The reset button is difficult to find; it's located close to the connector at the base of the unit. It is an annoying problem as it happens without any rhyme or reason. I now carry a paper clip in the car!