Hi my name isXXXXX will be right with you. I may have a few questions to be able to provide you with a more accurate answer to your question.
is it like this with all inputs and source equipment, DVD, cable box, ect ?
let me check
i hooked up a video game and there was no split screen.
Also used same input as tv
So the problem only exsist with what Cable box ?
can a cable box cause a tv to split screen? - I have another box on a different TV and it is working fine
It seems that somehow the output resolution seeting of your cable box might have got changed
so what now?>
while you were away i also plugged in a blue ray and the picture is fine
Al cable boxes are different in how the settings are ajusted, some are adjusted by powering off then pressing the menu button, a screen will appear that will allow you to use the remote to make changes, the HDMI out put setting should be set at 1080i
you may have to get the cable company to reset it for you.