Radeon 7870 HDMI out to HDTV Plasma In - No Sound


  1. bobland
    Posts : 247
    Windows 7 Professional SP1 64 bit Retail
       New #1

    Radeon 7870 HDMI out to HDTV Plasma In - No Sound


    Previously to today, I had the same Radeon but bought a Panasonic TC-50PS64 50" Plasma TV. I can get my desktop to appear on the TV via HDMI but can't get any sound. The previous TV was a 32" Sharp. Everything worked as expected but the Sharp was 720p vs 1080p for the Panasonic.

    I've read posts where people had problems with the 600hz refresh but I don't have that particular problem. I tested Firefox running Amazon Prime Videos, Netflix and YouTube. All ran the same. Viewable screen but no sound. The TV portion works with sound and Netflix via Wi-Fi works, just not HDMI from the desktop.

    Anyone have a clue how I can fix this?
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  3. fireberd
    Posts : 8,135
    Windows 10 64 bit
       New #2

    If it worked before, with a different TV, and now does not work with the new TV, I would suspect a problem with the TV and not the PC. Does the TV have more than one HDMI input? If it does change to a different HDMI port and see if that works.
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  4. bobland
    Posts : 247
    Windows 7 Professional SP1 64 bit Retail
    Thread Starter
       New #3

    Fixed. The fix is one of those bizarre procedures that bring back Ol' Time Voodoo. First, once I got the desktop on the TV, I pulled the HDMI cable from the TV and waited 3 seconds, plugged it back in. I was then able to enable the sound and everything worked. Weird. But, I now have a fully working desktop on my 50" Plasma.
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  6. derekimo
    Posts : 17,322
    Win 10 Pro x64
       New #4

    Have a look at this,

    How to Connect a PC to the TV - Support at Panasonic

    Edit: Looks like you already got it... :)
    Last edited by derekimo; 17 Jul 2013 at 19:06. Reason: Not fast enough
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  7. fireberd
    Posts : 8,135
    Windows 10 64 bit
       New #5

    Cool. "FM" works every time. :)
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