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My thanks to the gentleman who posted the link to Tom Tom's solutions link. Although I had been there previously months ago when I first encountered this problem, there had been at that time, no instructions from them on how to properly reset the One that does not have a reset pin hole. That was in March. There are now such instructions.
The key to resetting such a Tom Tom GPS device lies in plugging your One into your computer, which automatically launches Tom Tom Home software (please remember, you have to have Home software installed on your computer already). After doing this:
1. When Home launches, go to Manage My Device Folder (p.2) and click it to open it.
2. You will see a folder-style window which lists all of the items that are your device. Select the folder tab: 'Items on device.' Then Deselect Applications. Click OK when promted. The Applications software will be deleted from your Tom Tom One.
3. IMPORTANT! Then clcik the other folder tab 'Items on computer.' Do the same here by deselcting to uninstal software on your computer as well. Click OK when promted.
4. If you do not get an automatic dialog box indicating that you need new application software installed, return to p.1 and select the folder 'Update My Device.' Follow the instructions as prompted and Tom Tom will both download new computer Home software as well as new software to the One device.
That should do it.
I will tell you that it took me three passes at this process. So it's not a breeze. But in the end it finally worked. And my One, which had been down since March is once again finally up and running with new software and as well as I remember it working.
Hope this helps others.
The solution to this is quite simple. Buy a new Tom Tom.
The Tom Tom units are not serviceable items. It's silly and quite honestly inexperienced of you to think they are.
If it's still under warrenty, MAYBE Tom Tom would replace the unit free of charge . But don't hold your breath. As a cracked screen wouldn't be under the fair wear and tear usage policy. So I'm afraid it's a case of dusting those cobwebs out of your wallet.
The strange thing about your question is why open up the tom tom in the first place ?
You can't possibly have a replacement screen!
Your either 11 years old or a very strange person.
I suddenly lost the GPS signal today and could not get it back. All I got was the "No valid GPS signal". My solution was to tap on the GPS satellite bars when in the route map. this brought up the "Status summary page of the TOMTOM.
I then again tapped the satellite bar which brought up the "GPS Status" page. I then tapped the bar labeled "configure".
The radio button next to the option titled "Minutes (dm.m') was selected. I then moved the selection to "Degrees (d.d) and it started working.
I had just downloaded the GPS fix 5 days ago so it is not like this suddenly caused it to stop working.
This may not work for everyone but this is what it took to get mine working.
Turn the tomtom on, and then press the reset button on the bottom of the unit with a paperclip. After the reset turn off the unit and then turn it back on. Make sure you have not dislodged the sd card from the unit.