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no aduio after upgrade RT4

Hello experts I have upgraded RT4 from 7.11 to 8.11, the whole instalation was sucesfull,everything works except the audio – no radio, no navigation sound, nothing. I tried also 8.20 with same result, everything works again except the audio. The sound system is JBL. Is there any set up I have to do and enable the audio using peugeot planet. or can anyone share firmware 7.11 so I can downgrade it back.


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