Question about Toshiba CF32G40 32" TV

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No picture when we turn on the tv we only have sound without image only black screen

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Re: no picture

Depending on the make and model of the TV, the problem can be a poor connection such as a dry-joint on the main board or a failed line-output stage or simply a physically damaged screen. The latter problem can crop up when the TV is dropped, for example. Please feel free to specify make/model and what happened prior to the problem.

Posted on Jan 18, 2008

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No picture, no menu, black screen, no raster, sound ok

From your detailed description, it sounds that the main chroma processor IC has damaged. Raster means nothing, but the lighted screen that appears, when a TV is switched ON. For some brands, there will be a blue screen; when there is no signal input, and some others will have a bright white screen with some snow.
I advice you to contact any service technician, to get this TV repaired. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Pull up older posts. Surf the site with patience. Do a search by type in the brand name of your device at its search box and press "Enter".

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Sounds like the brightness might have been turned down. Does it have a manual brightness control? Sometimes there is a combination of buttons you can push on the remote to reset the TV to factory specs. Add some more info about the TV, Make, Model #

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Sounds like the PIP feature is causing the problem with the TV if you are connected directly to cable TV without a box inline and getting these issues.

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Might be a bad CRT or bad video output IC that drives the CRT that would cause this issue.

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Usually that symptom is caused by cracked solder joints on the vertical output IC. As the IC starts heating up, the picture starts breaking up at the top with several "dancing" dark lines appearing, the top scrunches down and then when the vertical quits altogether, the screen goes completely black. A good slap on the side of the TV might make it happen faster or clear it up temporarily. If you have experience working on PC boards then you can resolder the pins of the vertical output IC but if you have never soldered parts on PC boards then allow a qualified tech to handle it for you.

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