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If the first attempt of those methods above doesn't fix the speaker audio problem. The next option is to work on the Audio Codec IC. You may check the VBAT 3.7v across the filter inductor coil, this is the supply voltage to make the Audio IC work. If the voltage is okay, check all the surrounding components of the Audio chip.
If the first attempt of those methods above doesn't fix the speaker audio problem. The next option is to work on the Audio Codec IC. You may check the VBAT 3.7v across the filter inductor coil, this is the supply voltage to make the Audio IC work. If the voltage is okay, check all the surrounding components of the Audio chip.
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