PRS-T1 as kndle version only

Hello,

I have on rootet t1 was good for 4months since on crash with the app mortplayer i'm not more apply to go back to sony homescreen.
Adw launcher is working,WiFi is working,root explorer and kinkle app is running also.
The factory reset does not work because i can not shutt down my device compleded .I can not access to the microcard.
Have somebody on idea was i can do to fix the problem?

Thanks

Josef