Baytrail Tablet hangs after bios load

[trsh]

Hi here,

i have an wintron 7.0 Tablet with Intel Z3735G processor  from german company Trekstor, which doesn't go past bios and menu where you can select boot device and efi shell.

The problem is that there is just an black screen after you select any boot option (even efi shell which should work)
Flashing bios from update package onto new flash didn't work, same thing happens.

Looks like an bios bug, can someone please find out if legacy boot can be forced or what could cause the hang on boot.

Bios file:
https://drive.google.com/file/d/1ySSibva...sp=sharing