Nakamichi Shockwafe Elite 7.2.4 soundbar loses power. Won't turn on. Sometimes it will turn on and last for about an hour then loses power again. It sometimes powers on in standby and when the tv attempts to send audio to it loses power again. By losing power I mean shuts off completely with no status lights and appears to be unplugged. Things I've tried: plugging into another outlet. Leaving unplugged for hours and trying again. Trying different power strips and in different outlets. Does someone have any experience with this? Thanks!