Hello guys. I had a strange problem with the backlight. As I wrote above, this only happens when the monitor is turned off. Everything works fine with the monitor turned on. Apart from this, there are no problems with the video card.
System specs:
RX 6900 XT Merc 319
AMD Ryzen 7 2700X Eight-Core Processor 8 Cores
Corsair 32 GB (2x16GB) DDR4 3200 MHz Vengeance LPX Black
ASRock B450M Pro4 R2.0 (AM4)
ATX2.31 850W GP-P850GM GIGABYTE
2 TB Seagate ST2000DM006-2DM164 (SATA )
1 TB Seagate ST1000DM003-1ER162 (SATA )
Windows 10 Pro
SATURN TV LED19A Monitor (or rather TV)