Att uverse: I need someone with att uverse and a sanyo dp26746?

to tell me how to program the aspect ratio on my tv. I did it on the receiver, but att tells me the tv has to match in order to get the best hd picture. if anyone has a sanyo dp 26746 and has their manual, can you tell me how to program this tv? I will try to download a manual, too.|||All you need is HD capable cables either HDMI (1 cable for audio/video, and has some issues with our cable boxes) or Component cables (5 cables, 3 video and 2 audio cables) and the TV will be able to display in HD as long as you have the HD package with U-verse