Both right and left sides of the picture on my Toshiba 27D46 (the manual also says 32D46 - not sure exactly which model it is) is cut off - I can't see the margins. I'd say maybe two-three inches don't show up, which is a problem if I'm looking at the TV Guide channel.
I did cycle through the aspect ratios with the Pic Size button on my remote, but it doesn't have any affect. It's almost as if the picture is on zoom, and I can't turn it off.
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Here is a manual for that tv. Page 27 says to push the tv/video button but that is on the remote. Do you have a tv/video button on the tv itself? If so, push it until it cycles through to the video input you want
Your problem is due to failure of the vertical scanning circuits in your TV. This is quite common and is caused by aging components. Generally drying out capacitors
You got to be careful not to leave it on too long when the picture collapses, it will burn a permanent line across the screen.
If you are an electronics expert you can fix it if you get a schematic. If not please don't attempt to reapir it yourself since there is high voltage in side the TV.
The problem may get worse with time.
Usually that is caused by a part failure. The vertical deflection ckt is most likely the roblem. Sometimes it's just a cap usually a 100mf right next to the vertical ic chip. Or it can be the ic itself. Unfortunately you can't adjust it out.
You need to bypass your A/V tuner for your video connections (if possible). Plug your video directly into the TV and audio into the tuner. This will also give you a cleaner signal/picture as it does not have to processed by your tuner BEFORE it goes to your tv. Think of it as cutting out the middle man. Your tuner is best left for powering your speaker and not controlling your video despite all of the available connections in the back of it.
I would also get rid of your VHS and cassette players as they are dead technology. Clean up your system and remove the clutter. This will lessen your chance of getting interference. Good luck!!
try fiddling with the tv menu. most tvs have the zoom function now and also the ratio function. try testing those configurations starting from the default. make sure you have the zoom function set at 0 before fiddling with the ratio aspect.