Thank you very much Kunix! I am very glad to inform you that I managed to do everything and the sat nav come back for new life.
THANK YOU!
But now there is another problem. The sat nav is an American one, but I am in Bulgaria and it can not connect to sattelites. It finds sattelites, but can not connect to them.
I made hard reset, NonVol reset after that in satelite menu Single Start and leave it for 1 hour in open place but can`t connect to sattelites.
Have you any idear what to do with it?
Thank you!