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    Post Sound beep without pressing anything with mute volume

    Install this app to fix MCU https://www.sendspace.com/file/ijmf13
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    Thread How to return from hal9k to original software

    Dear all I have chs px6 rk3399 with original android 9 , i flash hal9k software and i like to return to the original software i have the software and try with SDcard Usb and it refused to install "regestred error" is there any way please.
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    Thread black screen px6 android 9.0 rk3399 mtce

    Dear All I tried to install another firmware to my head unit and i have a black screen i try to reset it and disconnect power but it still black screen how can i enter recovery mode or any solution? MTCE RK3399 Android 9.0 MCU v3.40_1