I have tried different combinations while the boot.us is the original. As I am always getting the alarm screen at startup I suppose the problem should with the boot.us or with the device itself or its content ( which file to delete or rename?).
I should add that 2 out of 10 times the device could boot normally and load the maps. At that time I could get all the modifications.
Does anyone knows how to edit this file and which area /code? I would appreciate any idea or direction
Thanks for taking the time