Question about Sony FD Trinitron WEGA KV-36FS120 36" TV

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Super high pitch whistle from tv, only powering it off helps.

My tv is 13 years old, picture is still fine, but a super high pitch whistle comes from it. turning it on and off sometimes will help for a short while. its a 36" sony wega- 300 lbs monster to transport.

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Shut it off and unplug. You have a serious HIGH VOLTAGE problem that could cause a fire. Professional repair needed.

Posted on Mar 08, 2009

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I have a RCA projection TV. The picture and sound are fine. After the TV is on for a bit it starts a highe pitch whistle. The picture and sound continue to be fine. What is the problem and what can I do to...


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High pitched whistling


Try changing refresh frequency, color depth or resolution (wait for the whistle to appear before testing). Admittedly, you might have to give up some image quality - less colors, or less resolution. There is probably a problem in the TV syncing mechanism - if you can, try getting it replaced. "High pitched whistles" in video and TV hardware are usually harbingers of bad news.

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Television won't power up


It sounds like the high voltage circuit got damp and arced. This arc caused the horizontal output transistor to short.
You might try replacing the output transistor if you're experienced in this type of repair. If not then you need to take it to a repair shop.
The "whistle " you're hearing is the power supply indicating that it has a short on its load. When the power supply has an over load (short) its frequency drops down when your ear can hear it oscillating. This type of power supply is a switching power supply normally operating a several thousand hz(cycles) which is out of range of human hearing.

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I think maybe the G-board needs to be replaced. A TV shop will have to repair it. They normally start around $200.00

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I wonder if there is enough air circulating around your equipment?? My DVD recorder makes a sound unless I open the doors on the cabinet that contains all of my equipment. The cable company says it is a fan to cool down the units.

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