

The “fixed” board is still noisy, but the volume goes quiet very quickly if no sound is being reproduced. You still hear crackling but at least it falls off instead of always persisting.
I am no engineer, but I suspect the audio is not shielded enough. Perhaps oled uses more current than led? I noticed the noise corresponds to the amount of motion on the screen.
I’m gonna throw in this for you: have you considered a VR headset like Quest? I watch YouTube pretty much exclusively on mine. If you like to watch stuff in bed, you won’t mess your neck, too.