I'm using 3.5mm jack, not USB.  I don't think any internal contact is broken, because it's the same via front "headphone" or rear "line-out".

On 2025-09-21 22:14, Don Tai wrote:
Do you use an audio jack or USB? If an audio jack, it is possible that the contacts are dirty and need cleaning. You can try a little electrical contact cleaner. But this should not affect the stereo/mono settings.

On Sun, 21 Sept 2025 at 22:11, William Park via Talk <talk@lists.gtalug.org> wrote:
My audio used to work properly in stereo.  All of sudden, it stopped
working in stereo.  Depending on headphones,
     - only 1 side has sound, or
     - both sides have sound, but it's mono (ie. same sound on both side).

Anyone experienced this?
How long before the whole motherboard dies?
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