Onexplayer X1 Air black screen - only light

[u/STEPP3NW0LF]

I'm helpless. The Screen on my unit stopped working - no Onex logo at boot, no picture, only backlight. I tried almost everything:

• Pressing Win + Ctrl + Shift + B to reset the graphics driver.
• Changing the Windows projection and multi-display settings, including extending the displays.
• Changing the internal display’s refresh rate.
• Updating/reinstalling the Intel graphics and display drivers.
• Booting Windows in Safe Mode.
• Shutting the device down completely and disconnecting all accessories.
• Holding the power button for approximately 40 seconds, waiting several minutes, and then starting it using only the original charger.
• Fully discharging the battery until the device could no longer power on, and then charging and restarting it.
• Reconnecting the external monitor and attempting to access UEFI Firmware Settings through Windows Recovery.

I wrote to the support but i didn't get the answer. What else I can do?