After 408 BIOS update the BIOS won't light up display. Content can be seen by lighting screen externally (very poorly). Solution was to disassembly laptop, disconnect internal display, connect external display trough HDMI and downgrade to 406 (tried reinstalling 408 with no success).
Next problem is also on 406 - can't change keyboard brightness trough FN keys (Armoury Crate works).
Asus TUF A15 FA506QR