Hello, I recently bought a DVI to HDMI connector as an attempt to get my RCA plasma TV to HD (the front of the tv says HDTV on it). We hooked one end to the tv and the other end into our Time Warner Cable Box. Next we changed the video source to Dvi and the cable was there in hd but there was no sound. The TV was bought at a garage sale and initially the sound didn't work until we put in our own speakers. After going in the channel setup from the menu it went back to the original non hd we've always watched. Also, the sound was coming from the TV speakers instead of our speakers (which we don't mind because our speakers weren't great). Any help on how to fix this is greatly appreciated.