I have a vizio SB3651-E6 sound bar and trying to hook to my 46 inch Sharp TV. HDMI outlets on back of computer all say they are "input". The instructions for the sound bar says I should use only "output" HDMI...nothing indicates ARC. There are outlets for "digital audio output" and I have the RCA cable hooked there, but nothing gets to the sound bar. No relevant settings can be found on TV...ie., now "search for device"...I'm lost!