TVs & Home Theaters forum


LG55LA7400 no sound to external speakers ARC

by mhalper / July 20, 2013 3:42 AM PDT

I have a new LG55LA7400 and a Panasonic SC-HTB20 home theater unit. When I hook up the speakers (ARC HDMI out) to ARC HDMI on the TV and set the TV for external speaker ARC/digital optical I don't get any sound. I have also tried using an optical digital cable between them, but still no sound. My TV input is over-the-air. The set seems to recognize the speakers, but says no input signal? Any thoughts.

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All Answers

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My experience with ARC
by Pepe7 / July 22, 2013 5:16 AM PDT

First, it's a work in progress. Second, I had better luck using devices of the same brand. Third, some content sent back out from the HDTV in this manner is still restrictive. IOW, you won't always get what you want (e.g. 5.1, etc.).

Maybe it's what you wrote though that has me slightly confused. Your speakers should be hooked up to your Panasonic unit and not to anything else. Digital optical is not capable of ARC, FWIW. Also, *all* devices must support ARC for this to work, not just one with ARC-HDMI and the other, only plain HDMI.

It would be helpful if you were to be more explicit about precisely how *everything* is hooked up currently(?) That way we can further deduce a solution. For example:

LG55LA7400 (HDMI output from ARC port) ---> (HDMI ARC input) Panasonic unit


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reply to "my experience with arc"
by mhalper / July 22, 2013 10:29 PM PDT
In reply to: My experience with ARC

The TV is new and has an ARC HDMI slot and the Panasonic unit is a "home theater" left and right speakers with the amp and base in one unit (it also has an ARC HDMI slot). Both also have digital optical connections also. I now think the Panasonic unit may be bad, because it doesn't work hooked up to either my DVD or DVR using optical digital cable.

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