Thanks. I'm glad it made sense. Unfortunately, the FIOS box works fine regardless of where I plug it in. The PC actually seems to work with any HDMI port as long as I plug it in before plugging in the FIOS cable and have the TV switched to that input setting. BUT, if I then change the input setting on the TV to FIOS, when I change it back to the PC there is no sound anymore. It will only be working with FIOS.