TVs & Home Theaters forum


LG 55GA6400 Optical Out Sound Problem

by frogfuzion / June 30, 2013 10:44 PM PDT


PS3, Motorola STB into LG tv via HDMI.

Digital Optical Out sound from tv to Sony Playstation Soundbar. Tv speakers are turned off.

Problem: Sound will periodically cut out and quickly fade back in (few times an hour).

Troubleshooting so far:
-Tried 3 different optical cables
-Tried playstation and stb directly to sound bar (no problems with those)
-Took tv back - thought it was defective, same problem with new tv
-Called lg support, they replaced the board in the tv, Same problem

Still a problem. Could it be a compatibility issue between the soundbar and the tv? It can't be a coincidence that both tvs have the problem right?

I'm stumped. Any insight? Should i get another sound bar?

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Clarification Request
what happens
by samkh / July 1, 2013 1:04 AM PDT

when you set (or turn off) the surround modes of the LG or Sony or both to just stereo?

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I'll check this
by frogfuzion / July 1, 2013 1:22 AM PDT
In reply to: what happens

I'm not sure that the sony has a surround mode. The sony is set to stereo setting and the LG is set to "auto" with 5.1 and pcm as options. I have tested changing both of those settings and nothing was resolved.

I'll check for surround settings.

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If you already have
by samkh / July 1, 2013 2:43 AM PDT
In reply to: I'll check this

set LG to pcm and it still happens, the Sony is not decoding the LG consistently. Try a different soundbar.

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by frogfuzion / July 11, 2013 10:19 AM PDT
In reply to: If you already have

I was able to resolve the issue.

For some reason the issue was only with the combination of this sound bar and this tv...

When i got a new soundbar (sony ht-ct150) the problem no longer occurred.

I must reiterate that the old soundbar worked fine with other input devices... just this combination of LG GA6400 was the problem.

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