Default [Q] Black screen smartphone still working but no access to internal sd

Hello, my HTC One S felt and now I have a black screen since power on.The touch screen works (I successed to shut down an alarm). The phone is still working cause I have access to it via adb and fastboot but I don't have acces to my internal sd cause I don't have the superuser rights.
I tried adb pull / , tried qtadb, adb shell then su I always get a "permission denied" error.

My ROM was CM 10.2 without a pattern to unlock and it is rooted. I can't mount my sd cause I must use the screen to activate mass storage USB.

Do you have any idea to help me please?

Sorry for my bad english I'm french