Having problems with your Flat Panel Televisions ?

I have a Toshiba 51H84. I was trying to hook up my Xbox and the HDMI wouldn't work. Now the video works and the audio will work for about 30 seconds then the Audio cuts out but the video stays? Wondering if it's a problem with tehe HDMI input? It had a weird biz that screws into the back panel as has plugs but no other boards.



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