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  1. #1
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    HDMI ARC stops working after 5-10 minutes

    Hello,
    I have a strange problem with HDMI ARC on my 47PFL4007T/12. After I have turned on the TV and the receiver, a Harman Kardon AVR-156, everything works fine in the beginning. The TV recognizes the receiver, turns off it's speakers and redirects the sound to the receiver. But after 5-10 minutes the sound begins to have disturbances and the receiver looses the signal several times during only a few seconds. After a short while there's no sound at all, everything is quiet.

    I then have to turn off the receiver to make the TV switch back to it's own speakers and then turn on the receiver again to make HDMI ARC work.

    Does anyone have any idea? I know it could be my receiver but to me it appears that it is the TV that can't send the sound signal to the receiver because the receiver has difficulties to interpreting the signal when it begins have disturbances.

    Regards, Clas Ericson

  2. #2
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    Quote Originally Posted by clasericson View Post
    Hello,
    I have a strange problem with HDMI ARC on my 47PFL4007T/12. After I have turned on the TV and the receiver, a Harman Kardon AVR-156, everything works fine in the beginning. The TV recognizes the receiver, turns off it's speakers and redirects the sound to the receiver. But after 5-10 minutes the sound begins to have disturbances and the receiver looses the signal several times during only a few seconds. After a short while there's no sound at all, everything is quiet.

    I then have to turn off the receiver to make the TV switch back to it's own speakers and then turn on the receiver again to make HDMI ARC work.

    Does anyone have any idea? I know it could be my receiver but to me it appears that it is the TV that can't send the sound signal to the receiver because the receiver has difficulties to interpreting the signal when it begins have disturbances.

    Regards, Clas Ericson

    Hi Clas,

    Ensure your HDMI cable is no longer than 10 meters. The shorter the better though, so under 5 meters is advised.

    Ensure it is a high speed HDMI cable (1.3 or 1.4).

    Try to change the audio out of the TV from Multichannel to Stereo:
    HOME > [Setup] > [TV settings] > [Sound] > [Digital output format] > [Stereo] > OK

    Try with a different HDMI cable.

    Best regards,
    Ina
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    Thanks for your reply!

    I bought a new HDMI cable and that appears to have solved the problem. The old one was supposed to support ARC but maybe the quality was not solid. Strange though that it worked for 5-10 minutes. In my mind it should've worked all the time or not at all.

    Regards, Clas

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    Quote Originally Posted by clasericson View Post
    Thanks for your reply!

    I bought a new HDMI cable and that appears to have solved the problem. The old one was supposed to support ARC but maybe the quality was not solid. Strange though that it worked for 5-10 minutes. In my mind it should've worked all the time or not at all.

    Regards, Clas

    Hi Clas,

    The ARC connection point in the HDMI plug could perhaps have been slightly damaged so the connection to the HDMI port wasn't stable.

    I'm glad you managed to resolve this with a new cable.

    Best regards,
    Ina
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