Kobo Glo HD stuck on red light

Hi all,

my wife's kobo glo hd stop working. The kobo is charged (full night and power bank has gone down in %), but when I power on the led red light is always on.
The screen is stucked on the last rendered image and never change. I tried to remove the SD card and never changed.
Start the kobo with or without the SD card is always the same.

Thanks