hope someone can help, have dish ....

[zfactor]

and a toshiba 65h84. i have recently been getting a black bar down the right side of the screen only on certain channels. swapped boxes still there. tried vcr and dvd on same set of inputs goes away perfect picture. called in a tech (same that did my isf) and he checked everything out and all was fine coudln't find any problems. called dish back and of course they say it must be your tv. our boxes are fine. i swapped boxes and it still does this with any of my dish boxes but not with any other source in on the same set of inputs. tried rca svideo and component in also any ideas. dish was not very helpful on the phone. thanks very much

 

[zfactor]

also i know i should not really do this but just to trouble shoot i asked my neighbor if we could (since here in fl where i am the houses are right next to each other) run a cable from his outside connection from comcast just to see what happend and the side bars are gone do not show up at all. we then unhooked the line for the record. again this was just to test the actual tv set. ahy help thanks