When it's cold, no sound output, I put a hot pack on the amp to warm it up.... sound works.
Any experience share is highly appreciated.

 

Does the subwoofer work with deep boomy sounds even what there isn't any music sound?

Bose system in an S or base model non-Bose?

 

No

Bose system in base model

 

If it has Bose and there is nothing from the speakers or the sub, it's not the amp, it's the PCM itself. The amp in a Bose setup receives separate and regular inputs and has its own amp to drive the sub. With what you describe, you're getting no output from the PCM to either amp.

 

So how does that explain the "cold" amp phenomenon?

 

Coincidence.

 

It's not cold amp syndrome, it's cold PCM syndrome.

 

I still don't get it.
When I put a hot water bottle (hot pack) on my amp, sound comes on.
How is that a PCM issue? Please explain to me as I'm a novice at this and am eager to learn.
Thanks

 

Either you're getting output from the amp when you're not getting music from the speakers which would be the amp or you're not getting any output which would be the PCM. Warming the amp and making it play sure sounds like it's the amp, but if the subwoofer isn't working either, that's the PCM. Or, the car doesn't have Bose which means the amp drives the sub and the speakers and it's the amp.

 

Your system has a fiber optical chained network. There is a digital connection to your amp from pcm, and any one component could cause your system to fail. I can’t remember if the bose amp sends the sound to the sub amp or not. You can try to install a MOST loop adapter in the Bose amp and see if the sub is playing after that.

 

Replaced the amp, problem solved.
Thanks for those who contributed.