kobo n905c sd card

Nello,
I nave a lobo n905c with stucked software.
I found a SD image on ThE web,uploaded it on SD card,AMD inserted in ThE tablet!
It s start to work properly,but ThE screen width is not ThE same as original.
Images go out from ThE side.
Maybe ThE firmware is noto right.
Do anybody nave ThE right SD image please?
I will leave my e-mail:
Feriondiransagor@hotmail.com
Thank you!