Technical HELP needed: Poppulse T150ce - FAULT investigation

[Giuliano69]

Hi all,
I noticed that my (10 years old) POPPULSE T150CE shows a great attenuation on the left channel .
The channel is still present, but with a very little volume

Swapping input source/speaker wiring, shows that the problem is in the output of the amplifier.

I opened it and didn’t find burned components.
Just some oxidation/leakage under the Tripath 2022 pins (but there are no caps near there... where could it come from... ).

No caps seems exploded, as well as the two big ones show a bit "domed"

I add some photos link to show the state of the PCB

I kindly ASK for HELP :

• Which kind of MEASURE with a digital multi-meter could I do, to narrow the faulty stage ?
• From the pictures below, do you notice some strange/SUSPECT components ?
• Is there a way to REGULATE the balance/gain of the attenuated channel , to raise to the same level of the right channel ?

Thanks in advance for any help
Giuliano

https://photos.app.goo.gl/fKjV3svcXNNA9ajBA
https://photos.app.goo.gl/ULdB8don5mdnsWqNA
https://photos.app.goo.gl/1AWnCedD6RsETyk2A
https://photos.app.goo.gl/u15eJrv3Q62Sen3W6
https://photos.app.goo.gl/A9cC8N7dDaG3TAUn9
https://photos.app.goo.gl/12bSRFSboHpvTa8h9
https://photos.app.goo.gl/DUwRAnStYvnhUK5x8
https://photos.app.goo.gl/ozRtkaX9RYLCDbbU9