Just bought this sound bar today and everything went well. However, when I tunred it on again alongside the tv, it would not stay on. It will occasionally show the model name when I press the source button on the tv remote but it changes back to the HDMI 1 which is the ARC HDMI. I have tried resetting it by holding the power and the - volume as instruction manual states but it still only starts up and then closes down straight away. Appreciative of any help!😳