Hi,
Thanks to all here. I managed to restore my dead device and want to share
Pocketbook 626 8Gb SD ready image.
All you need to save this image to some drive under Linux and run the following command from the folder where it saved as
su:
gunzip -c pb626.img.gz | dd of=/dev/mmcblk0 bs=1M status=progress
Replace
/dev/mmcblk0 on your actual SD card device. You can find it with:
fdisk -l
Good luck!