Huawai Matebook X Pro Mach-W29 - No display

[Sofian75]

The laptop is working fine except that there is nothing on the screen.
I can use it with a HDMI cable on my monitor, the laptop display is not detected in the windows device manager.
I ve already ordered a new LCD assembly but I am worried that it could be a waste of money if the problem is somewhere else.

I took of the screen and can't find anything wrong with the cables, except I have 3v instead of 19v on what I assume to be the power pin (?)
What should I check?
Could it be a corrupted bios issue?

I can't find a detailed bordview so really don't know where to look.

[mon2]

There appears to be a few boardviews and schematics of this series in my paid database. Which year is your laptop?