Make sure your cable box is set to 16:9.
You will find the Model# on the back of the tv.
where to find the Owner's Manuals:
I just hooked up a HD cable box to my HD DLP Toshiba TV, but the DTV format is set at\ 480i.
I want to change the 480i to 1080i or at least close to that DTV format. I asked the cable guy, but he was not very helpful. In fact he told me to checkout the TV user manual, but the problem is I cannot find it and I am still searching for it.
Does anybody know hot to change or set the DTV formats on a HDTV?
Also it is different depending on what brand of TV. I have a Toshiba and Sony brand HDTV if the brand has anything to do with the DTV format setup.