Lexusowneris250

My Is250 F sport 2014. The same problem. Everything works except for volume control. DSP inactive. Treble, mid and bass are frozen, , front, rear left, right, are frozen as well. It is software I think. It came up after I accidentally pushed SOS button in the darkness trying to find light. To me it is class action for Lexus. I’ve read dozens of the same questions in Russian language as well. So it is kind of global problem. I paid today 170$ to a Lexus dealership for diagnostics. They said need to substitute radio. Cost to substitute radio is 2600$. I would spend 500$ for class action and they will fix it for free.