Toshiba Lcd Tv Upper Right Corner Vga Input Why Is It Fuzzy On Upper Channels On 26in Toshiba Lcd TV 26AV500U?

Why is it fuzzy on upper channels on 26in toshiba lcd TV 26AV500U? - toshiba lcd tv upper right corner vga input

Channel 30, until it is so diffuse some more than others. Is 7 months. The CH-50 and 51, which freezes and wider so that it works. We have a Samsung LCD 32 on the same day and never had a problem that Evan is more channels than the Toshiba. Can this be corrected? Why are only some channels fuzzy?