Asus ROG PG48UQ 4K OLED 120hz (Coil Whine) (Solution, Mute the inbuilt speakers) - Смотреть видео или скачать видео в MP4, музыку MP3 на телефон или компьютер
annoying coilwhine ejected from the screen when turned on.( Edit! I found the solution is to mute the inbuilt speakers, they were the source of the whine.)