Question about Sony FD Trinitron WEGA KV-27FS120 27" TV

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TV powers on then shuts off

I turn the TV on, the screen is looks green with static, then turns off by itself. I have another model just like it for parts, is there something I can inerchange myself?

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Re: TV powers on then shuts off

Hello catapracht, It looks like you shutdown circuit is turning the TV off due to a problem in the HV section. What you are seen is possibly a green cathode short and some blooming occuring. These will caused increased anode voltage and trigger the shutdown circuit. At this point I would not suggest blind swapping of parts but rather you find a repair shop on, or find a shop close to you to have this problem dealt with. Because these are dangerous voltages you will be dealing with and without the training and knowledge of TV repair it would not be adviseable to do these repairs yourself. However you can be of assistance in have this information ready for the repair person. Thank you, I hope this helps. Shuttle83

Posted on Sep 07, 2007

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Problem with RCA TV Model 27F634T

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Sorry to have such good news, but this is one of the ways a picture tube can go bad, and it happens quite often.

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HI there,

Check for any bad solder on the mainboard of the TV, and also check for any burn fuse on the powersupply area... BAd solder was very common problem on Mitsubishi TV..


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This TV has reached the end of its (short) life. Needs to be replaced.

You can try looking at what kind of TV it is, what model, and look at the manufacturer's web site, check for the manual, look up what it means when the green light flashes. Might be a code that means something but I think the TV is dead.

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How old is this TV?
Sounds like it has high voltage failure.
(If you hold your hand on the screen when you try and turn it on, do you feel the static? )
Unless the set is over 10 years old, I would overhaul the high voltage circuit. Should cost under $200 at a shop.

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If you would like us to help you, you must tell us what brand and model TV you have.

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