GS450H no audio fault

[subman]

Yesterday when I start my car there is a loud pop sound coming from the audio speakers, music still works etc. Today when I start my car a softer pop sound but this time audio is gone. All the GPS, music app are still working on screen but the option to adjust sound volume has disappeared. Pressing the vol up and down on the steering wheel control does nothing either. 

I have disconnected the 12v Battery for a few mins and it make no difference once I start the car up again. I have researched on line and found a few discussion about how to fix it, the car is with Lexus today for servicing and once it come back I will have a look at radio 1 and 2 fuse and see it that is the issue. I am good with electronic and soldering but I am not sure if I could replace component on a PCB inside the amplifier. 

Would love to here from anyone who had this problem and fix

 

 

[cruisermark]

I had the same set of events with my 430 and it turned out to be the amplifier.

On mine the temperature adjustment beeps were also gone

This was repaired by SVT services in Edinburgh.

You could ring them for advice