Bluetooth, ipod, radio doesn't work.
 

I have a 2014 is 350 f sport with 28k miles. My speakers just suddenly wouldn't play music anymore.
I haven't done anything to the speakers in the car. They're stock speakers, not the mark Livingston ones.

In radio, Bluetooth and iPod sources the speakers would not play anything sound.
I have not tried aux yet, but will do so tomorrow.
The navigation, speech recognition, and trackball motion sounds still work. I can hear it loud and clear.
This has led to my believe the amp is blown or something.

Has anybody else had this experience?
I would like to hear your comments and suggestions on the issue.
I would also like to know whether this is covered under the 30k bumper to bumper warranty.
I spoke to my local Lexus dealership's service adviser and she was very vague about the fees.
There might be a diagnostic fee of 300$ and overnight storage fee of another 300$, and this is without the guarantee that I'm covered by warranty.

Before doing anything that involves spending money, my first action would be to check any fuse related to the stereo.

I had had same thing happen in my Viper. Brand new on delivery day, had no music from speakers. Stereo fuse was blown. Replaced it and never had another issue