u/PlatosBalls

My X93L is giving off a high-frequency tone that correlates with HDR scene brightness

Playing Far Cry 5 in HDR at volume 1 (kid and wife sleeping). I can clearly hear a high-frequency tone from the TV that scales with on-screen luminance, it’s quiet in dark scenes, loud and obvious when I pan to the sun or a bright sky. The correlation is 1:1 with brightness.

I also hear it when the TV is in standby mode but it’s “minimal” I guess.

Sounds like coil whine from the backlight driver / local dimming circuit to me.

Two questions:

1. For those who’ve dealt with it did Peak Luminance Medium / Auto Local Dimming Medium meaningfully reduce it, or is warranty the only real fix?

Room is dead quiet when I notice it; inaudible over normal game audio.