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TV Sound Issues @ 4K60Hz

tommoose13
By tommoose13
in Troubleshooting
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Hi all, I have an LG 49UB8500 that has been a great TV for years, but is suddenly experiencing sound issues.

Both my Apple TV 4K and Google TV dongle stopped outputting sound through it about a week ago. Nintendo switch still works.

 

After a bunch of testing, I’ve nailed it down to a possible bandwidth issue somewhere - my gaming PC can get 4K @ 30Hz with sound, 1080p @ 60Hz with sound, but 4K @ 60Hz loses sound output.

I’ve tested several cables, all known working with 4K @ 60Hz on another TV.

 

Does anyone know what could be the issue or where I should ask for more info?

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