A:AnswerWhen you are using an HDMI input and no signal is found, it will power itself down. It will not power back up automatically when input is again received.
A:AnswerYes. I have a sound bar home theater system i purchased to make a better quality of sound. I am able to turn one up and use my tv promote to add louder sound. You may choose different types of sound like base, stereo, audio stereo, ect...