jayswizz said:
I have a Comcast HD cable box. When I hit the PIP button on my TV remote the sub picture will show the same picture I am watching. My Hitachi manual says the TV has a built in dual tuner. Thank you for taking the time to help me out.
My guess here is that you want to images out of your cable box.
The problem being is that you only have one cable box. Your TV may have two tuners, but it isn't using either of them - or it seems to be that way. It is also very possible that the TV runs into some issues with it's ability to display HDTV with another source in a window at the same time. This is not always the case, but sometimes an issue. Since you do get the window, it sounds like it is not the case.
Bottom line is, if you only have the cable box connected to the TV, then you aren't using either tuner inside the TV and you actually need to run a cable line into the TV itself so that you are using the internal TV tuner along with the cable box. Then, read the manual, it will tell you how to pick a different source for the PIP window.
NOTE: A quick alternative to this is that many of the HD cable boxes, or at least the cable boxes with DVR built in, also include PIP functionality. I know my Scientific Atlanta HD-DVR cable box includes PIP.