I did this and it helped me shutdown the GPS.
I restored the backup and it's working again.

I tried to install Navcore 8562 again step by step :

Delete all files
copy navcore 8562 files to SD
Turn on GPS, says : no map
Then copy map and fastactivate
and did all 4 steps again

Then same problem, GPS turn on, message : Welcome to TomTome One XL and it restart all over.

Don't know what i do wrong ?

Backup with old navcore 8.010 + Bootloader 5.5128 + Western Europe 940.5993 is working fine.