2002 Lexus LS430 Q&A

2002 Lexus LS430 Question: Mark Levenson system radio only works with touch screen. The knobs will not work

I have a 2002 LS430 with Mark Levenson system. The radio works but only with on screen touch. The volume and station controls knobs do not work. I can hear the radio but cannot control anything with the knobs. It worked before the battery was changed but now it does not work properly . Do you what could be causing this problem? -
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