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Old 02-23-2020, 11:20 AM   #18
Sirtel
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Posts: 13,622
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Join Date: Jan 2014
Location: Estonia
Device: Kobo Sage & Libra 2
Quote:
Originally Posted by stumped View Post
a buzzing sound from a monitor sounds different to a coil whine from a PSU under load ( having experienced both).

I recall some discussion of PWM flickering but not sure if that was with libra or another device. I wonder if PWM can also generate a buzz ( which goes away at 100% bright because PWM is then disabled) ?
Perhaps it does. Many Lenovo laptops have PWM, so possibly it's the cause of buzzing on mine. (I wanted to test just now, but the damn thing wouldn't buzz when I needed it to. Later, perhaps)

Edit: nah, it still buzzes even with the light all the way up.

Last edited by Sirtel; 02-23-2020 at 11:23 AM.
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