The sound distortion problem affects all audio. I'll remove three other caps next to the volume knob and replace them soon. When I fired up the Duo, the left channel on the headphone jack started working, but the right was gone! WTF? I expected either both channels gone, or the right channel to still be working. I then removed C671 and cleaned up because it looked a little dodgy. The sound is now at full volume out of the headphone jack. I removed the volume knob to clean it, but I haven't put it back in. In regards to the missing left channel on the headphone jack: The distortion problem seems unrelated to the missing left headphone jack, because it sounds distorted through both the AV and headphone jack. But the was no change the distortion is still there. But I've cleaned it completely and switched out a couple of caps that that weren't on perfectly. I haven't had much time to work on the Duo until the past couple of days.
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