Thank you. That worked. But I am facing a different issue.
In T-Link settings, I have enabled auto power on and auto standby for soundbar so that I won't have to turn on the soundbar separately. Now when switch off TV, it turns off soundbar as well. Then when I turn on TV, it turns on soundbar but the sound output is in stereo. I tried playing a video using built in Media Center app. It has 5.1 AC3 audio and still plays in stereo mode. The only way to fix this is to restart the TV and now it outputs in 5.1.
But as soon as I switch off TV (by using power button on remote) and then turn it on again (using same remote button), it reverts to stereo. Have you faced this issue?