Just noticed... My Internal SD card is 4 Gb (the actual number was covered with an ink yellow dot on the card) see image on flickr:
Kobo internal memory exposed
I will let dd go for more time...
Got my 3,97Gb backup image
Tried SD with new image.
Nothing still happened.
Checked battery is at 4,15 Volt.
Microscopic connector won't allow me to check while it is connected...
I'm loosing all hopes.
I need to use my birthday gift from my wife for a new Kobo...
She does not work, so I would have preferred a non material gift from here (I stiil ned to pay for my gift

)