Thank you for your reply Paddyteclinde,
We still haven't found the problem, yesterday I opened the display and found that was not connected properly (I will try to post a picture), but after connecting it back it's the same thing screen comes on for a second and goes off again.
Here is a link to video and picture of display https://files.fm/u/8we6xn8q5

Thanks in advance

Hi Saso
Maybe you have got it fixed by now.
But apart from the normal checks , fuses, power at key switch etc.
One of the problems with these trucks is the small battery soldiered into the display card. If it goes flat , the truck will not turn. You can try replacing the battery , normally you need a new card.
Let me know how you got on