my tv suddenly turns widescreen?

so when I came home,I turned on the TV,it suddenly turns widescreen,I've checked the options and menu of the tv and there's no widescreen option,help??
Btw,its an LG XD 29"

2010-10-03T04:50:02Z

a little more detail,my channels doesn't come from an antenna,it comes from a decoder box

quikdash62010-10-02T19:06:48Z

Favorite Answer

It's most likely due to the source material you are receiving. Instead of the material being broadcast at the 4:3 aspect ratio it has now been changed to the 16:9 ratio.