Question about Sony KV-35S40 TV

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No video set comes on picture dark , hi voltage ok , sound ok , every so ofton the picture comes on for a few second then goes off

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  • 93 Answers

Try to resolder the flyback side,the vertical section,and the regulators.

Posted on Oct 19, 2007

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Posted on Jan 02, 2017

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When i turn the tv on the picture and sound come on ok then after a few seconds the picture goes off but the sound continues


solution
step 1 : at first test your fly back transformer


step 2 : test your video I.C.
step 3 : test contrast control system section
step 4 : A.C. transformer out put voltage testSend report :babul_jpi90@yahoo.com
thank you.
please only one vote me.






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Toshiba 27 Inchs, the immage dsiappear after few minutes, then i have to swich the Tv off for a while


If the picture is fading slowly out it could just be a cold solder connection on the ctr board or the Hi voltage circuit that supplys the filiment voltage to the crt. To check this you have the back off and when the pic goes out you look at the crt to see if its still lighting up. if its not then you gotta find out where your missing the filiment voltage at> If there is still a light inside the tube when the picture is dark then it could be a PIP problem or in the video section /video jungle IC on the set. Now these sets have alot of high voltage inside them even when the sets unplugged so I advise against going inside and tweeking with the set unless you know all the safty issues with the Hi voltage and storage capacitors inside this set. there are no real user serviceable parts inside these sets and should only be serviced by a quilified service person. Good Luck

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1 Answer

TV works fine for about 1hour.....then the picture


You have a problem in the Hi voltage or horizontal drive circuit most likly. Its a slight possiblity that the video is going out because of a cold solder connection from the flyback transformer blanking pulse to the video/sync separator circuit as it does and has happened in the past. This set should only be serviced by a trained service person as there are no real user serviceable parts inside this set. Good Luck

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