If it is a lose cable, you might be able to repair it yourself if you are brave. You would have to open the Ubook and check the LCD cable. Someone else actually opened the UBook to check on the SSD drive and the posting is here. It has a good picture of the components. It does show the LCD cable and its connection.
Maybe you can ask them how to open the case. Maybe even make a nice video for the rest of us as well. 
Of course, I am not sure if opening the case will void the warranty. Otherwise, you will have to send back to Chuwi for repair.