HDMI control, which is needed for ARC, can be a bit flaky. So, I would second the recommendation to try optical instead. However, it seems unlikely that the specific problem you are having is related to ARC and optical probably won't fix it. There are a few sets where optical supports DD 5.1 while ARC does not. But, aside from that, the two types should give you the same outputs.
post #1591 of 3379
4/13/13 at 4:50pm