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Clearly, check the speaker first.  You can simply unplug the existing speaker and connect a good one to see if you get sound back.

Replacing the amplifier on a 3V board is somewhat of a PITA, it's a small fine lead pitch part.  Replacing the amplifier on the 5V board, OTOH, is fairly easy, it's a much larger thru-hole part.

I disagree, replacing audio amp on 3V is easier for me.  The 5V takes more time and effort and plus proximity of other chips when resoldering legs.

Yes blown audio amp is possible.  But checking speaker, harness wires to speaker plug connection are also causes beside sounds turned off electronically.

Tech can test board out of engine to determine if audio amp is working or not.  G

That's why they make chocolate and vanilla George, I have no problem swapping the 5V audio amps.   I've learned to use my hot air tool on the 3V board amplifiers, that does make them easier to swap, but still more fiddly than the 5V ones.

You have to be kidding about the proximity of other chips on the 5V amp, the proximity of other legs on the closely spaced 3V amp are certainly more challenging using a soldering iron.

I always check the speaker and wiring first, and a feature or factory reset isn't a bad idea to make sure the audio isn't disabled in software.

Obviously, techs have the test set and can quickly determine if the board has a flaw, but I suspect that's not the go-to solution for most folks when they're trying to chase down this issue.

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