[Q3] I can't go to the main menu

[niandur]

Hi everybody!
I have a strange problem with my YP-Q3. I can't go to the main menu with the buttons. It seems to be missing. ¿?
I've read a lot of threads and i think there aren't any similar problem.
Someone can help me?

I've read that i suppose to have a file named config.dat in the root, but i haven't . I don't know if it is important.

All of the rest of device works good (i think) and the problem has occurred suddenly, without apparent reason.

I updated the device to the version 1.39

Well, if someone can tell me any clue to resolve this, i will be very grateful.

Thank you!