ROG STRIX G16 - Display issues

Hello! I’m having some issues with G-Sync on my G615LW laptop, I recently got it back from RMA and for almost 2 days it worked fine, today I disabled the VMD on the BIOS and went to reinstall windows and since I did that I can’t change brightness or enable G-SYNC on Ultimate GPU mode, also there is no STRIX animation on startup, from BIOS logo gets directly to Windows login after a black screen, all of that works fine in the Hybrid mode but I always use it in ultimate. Things I already tried:

1. DDU
2. Another Windows fresh install
3. Downgrading bios to .318
4. BIOS reset
5. EC - RTC reset

The only fix I found is removing the SSD that came with the laptop, if I remove it and launch Windows from a secondary SSD everything works fine in ultimate mode too, if I add the SSD again stops working, even if I launch the secondary Windows installation, I tried it after completely wiping the laptop’s SSD with GParted, inserted the ssd in slot #1 and everything broke again. If I remove it works fine, but obviously I need the storage 😬.

I don’t know what else I could try, if anyone has any idea it’s welcome, if not I’ll call ASUS tomorrow.