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Is this a factory (black box) or a PCA (grey box) tuner?

The factory ones regularly suffer from the failure of the audio output amplifier which gives this symptom.


Sorry I thought I posted that it was a factory tuner but I guess I didn't. If you could please share, which chip is the audio output amplifier? I have limited tools now (just a multi-meter) is there any voltages I could check for? I'm pretty good at soldering so I feel confident I could change a surface mounted chip (as long as it isn't huge).

Thanks