Having a handshake issue with an older Vizio 46" LCD GV46L. I have troubleshot the problem by powering on/off devices/TV with and without the HDMI plugged in, getting video with no audio. Using the same set up, I swapped the 46" Vizio with a newer 22" Vizio, no issue, audio and video no problem. Other devices have no issue on the 46" HDMI ports, so not a port issue. Not a cable issue either, because if used with 22" TV, all works fine. Is it possible that this 2006 model Vizio has an old version of HDMI that this cable doesn't like?? The cable is probably from 2007 maybe even 2006. Any advice? Suggestions for forcing a good handshake.