We have a rear projection Toshiba, with a 61" inch screen. We have a problem getting a picture. There are some channels that are perfect and with other channels we get a black screen right in the middle with only the top and bottom showing. There is sound, but we are only able to get around 12 channels that are viewable.
I agree W/Techman sounds like someone turned on the tex box Look in your insturction manual it will be in there how to turn it off or go to the Toshiba web sight and download the owners Manuau under Services Downloads
Good luck Walter Grzybowski
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I'm muziclady & I had three choices to choose for replacing the screen. The first was to purchase a new screen through Sony's parts dept. site
Secondly I found this this site that makes rear pro. screen antiglare screens: http://www.glarestopper.com/measure2.php
Also from this site, it has instructions for the removal of the screen to measure & re-install. [which is easy]. The actual screen size for the 61" is 58x30 inches, & it's referred as being a 61" Projection TV Screen Only [Lenticular Fresnel] .
My final choice was to Google for a screen replacement. I was fortunate to find a used one from an RCA television..It's the exact same size, etc.
Toshiba is one of the few sets that do not have a diagnosis feature built into the power light , Toshiba has to be able to light the screen to access its self diagnosis features. So you will most likely need the service manual to check the voltages in order to properly diagnose your set. You can get a service manual at the following link, and they will email it to you if you would like. here is the link. http://servicemanuals.vstore.ca/
Chassis will need to be pulled by a skilled technician.Some specific area hand-soldering
is needed and the STK convergence IC's need
changing w/OEM or better quality parts.You have a good set worthy of repair.
Any chance you could send a photo... Too many ideas come to mind from what you've described. Would actually have to see the "warp" in the picture itself to see if it's one or all colors, any boarders and if the bend is actually pulling from top or bottom..