I have a Polk Magnifi mini connected to the ARC HDMI on a Vizio M43-C1 I was using the HDMI cable that shipped with the Polk, but trying to fix this problem I switched to a BlueRigger high speed HDMI cable from Amazon. STB is a Samsung from Spectrum its connected to the high speed 60hz HDMI on TV. Audio setting on TV is TV speakers off. CEC is set to ARC only (recommended selection for sound bar) The issue is the sound bar does not always power on when I turn on the TV and STB and sometimes there is no sound. So sometimes I have to power on the Polk or disconnect and reconnect the HDMI from the sound bar to get the sound going. Its a bedroom TV I just want everything to work when I turn on the STB and TV