I have a Hitachi 57s700. Trying to connect it to a computer with a dvi video card and audio with a 3mm stereo output. The video works fine on input 1. The audio works out of the back of the computer to head phones. When connected from 3mm jack at computer to cable to two RCA jacks to input 1 on the tv, there is no audio. Volume is turned up max on computer and tv. How can I get audio