thanks for your answer!
my problem was...dust
the stranger thing was the phone was charging when it was off
no problem now!

few days after installing OTA 11, and few Updates later ( calendar, calcalendar, openstore), can't charging my phone, can't connect to desktop to.
The phone is charging when's off.
I was on stable version, i've try to change to Candidate but nothing change
Please do you have an idea?