Why isn't this ATT box suspect?
i recently had at&t uverse installed at my home. whenever i turn on the samsung pn50c550 i get a searching for signal & then a no signal detected box on the screen. if i unplug the hdmi cable & plug it right back in the same, or into another hdmi port the picture comes up. all the lights on at&t box are lit up, i've swapped hdmi cables. still same problem. i've looked at all the settings on the tv menu, but nothing jumps out at pertaining to this. any. i have two more at&t hd boxes & no problems with them.