Fix No Sound on Left or Right Speaker (Balance & Stereo)

Fix one speaker not working (left or right). Check balance settings, mono audio, cable issues, and device selection.

Step-by-stepBeginner friendlyNo installRuns locally

Step-by-step fixes

Test left/right channels
Test left/right channels – Use a stereo test to confirm which side is missing.
Check audio balance
Check audio balance – Windows/macOS balance sliders can mute one side.
Disable mono audio
Disable mono audio – Accessibility settings can force mono and break stereo expectations.
Check cables and ports
Check cables and ports – Reseat 3.5mm jack, try another port, clean dust carefully.
Try a different output device
Try a different output device – Switch from Bluetooth to wired (or vice versa).

After applying the steps above, run the tool to confirm the problem is solved: