Same thing for me on my GT-N7100
After drop on the ground and with a new screen at the beginning i have sound right and left lights on low side.
After search on the ned and reading the service manual i found shortcut on capacitors.
I replace the two capacitors and now work perfect.
I think that can work even for s3.
See my photo with red circle on capacitors.
Bye.
Doriano.
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