Kobo Glo: Need SD card image

Hello,

My Kobo Glo seems bricked: I have only fixed blue led when I want to turn on it.
I have tried all to wake up it but without result.
I have open my Kobo but I need a SD card image.

Is it possible to get an image to fix it?
Thank you in advance.

Greetings.
Excuse me fo my poor english, it is not my navive language.