Question about Philips TS2744C TV

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My tv turns off on its own during session.

The screen went white but you can still hear what you were watching then it turns off.

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Re: My tv turns off on its own during session.

Either the picture tube(crt) went bad, or the 200 volt source to it isnt there. this is usually derived from a pulse from the flyback transformer. in some sets, there are luminance buffer transistors(part of the rgb drive) that can go bad

Posted on Aug 09, 2007

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I am trying to help my neighbor. She has a Sanyo flat screen tv Model DS20930. The picture she gets is a thin line across the center of the screen.

Set the brightness, contrast and colour control of that TV to minimum. Watch it in a dark room whether ther are thin white lines across the screen, at about an inch apart, from bottom to top of the screen. If there are lines, that TV needs screen control adjustments. That is, now the screen voltage given to the picture tube went high to some reasons. If you have confidence that you can adjust it, I will guide you.
Open the back cover of that TV. Locate the LOT [Line output Transformer], usually one red thick wire is connected to the top of the picture tube with the help of a rubber ****** and clip. In most TVs it can be located and can be seen as the back cover opened. There are two variable control, fitted, integrated to LOT. Normally the upper one is marked as focus, and the lower one is marked as screen. You shoud adjust this control to avoid these lines.
It is a live service, that is the TV must be switched on during this time, and take causion in every respect not hurt by yoursef and the TV. Keep the children away from you, and an other adult person beside you is better. A liitle turn counterclockwise will remove this problem.

Oct 19, 2010 | Sanyo DS20930 20" TV

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Watching tv/w a dvd/vhs player(a seperate machine)the power goes out on the screen.went out with a white flash like usually when i turn it on the bottom where the control buttons are,a red light...

It seems that your unit has some sort of PSU fault, or a problem that is shutting down the Power Supply Unit, PSU. This happens so that no further damage, and possible fire will occur.
You need to take the unit to a reputable service centre/man and ask for a firm "Quote" for the work to be done. It is that sound that gives it away, this is a typical switchmode Power Supply problem.

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1 Answer

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1 Answer

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If it is not a hardware problem, it is most likely the Closed Captioning system.
If you can still see the on-screen menu, go into your TV's menus and disable Closed Captioning.

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Even with the tv turned off, the power supply is still active.It's supplying voltages to the microcontroler, that's why each time you press the power button on remote the tv respond by turning on. First check the power cord to be well connected in the power-bar and if it's ok...well the power supply is defective and due to the high risk of electric shock i suggest you to call a technicien.
P.S. I respond here because I don't know why our chat session got disconected.

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Picture has green tint on startup

Jar-Head, bad news, the picture tube has a mild short in the green cathode, tech can come out and try to restore it but it`s usually a futile attempt on sony tubes, sorry to be the bearer of bad news, BMW Rider

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