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- The power supply makes a huge difference in some boards, try to use an external 12V adapter or a better wall-usb adapter, have a look at this:Significant noise and distorded sound when unit is ON, no noise when unit is OFF (dry).
All voltage on U1 are OK except abnormal pin 3 which is around 1.0V instead of 0.1V (Ref: Guide to troubleshoot...)
Different people have reported that issue with pin 3 on the forum but none have explained what was the source of the problem.
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