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Re: Problem with RCA TV Model 27F634T
You almost certainly have a bad picture tube. The green screen was from one of the elements inside shorting out. The static sound you're hearing is the high voltage arcing out through the end of the picture tube to other parts inside the set. It's more economical to buy a new TV than to repair this one.
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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It may be arching from the flyback. If you are familiar with tv's remove the plastic case plug it in and turn it on and see if you can see anything visual happening. Make sure not to touch anything and keep a safe distance when inspecting.
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.
Have you tried to access the menu features and tried to retune the stations on digital, or are you hooked up for analog. If you don't know about what i speak, give me a yell. firstname.lastname@example.org I believe my remote sensor card is bad. While this might explain why you can't turn yours off, it would not explain the blank picture. If the menu does show, i would think the picture tube is O.K. if the menu does not show, there are some other things to look at.
It needs a new FLY BACK transformer. That is what you are looking at. The origionals are not made for the set any longer but insist on having a generic on installed by a local TV shop. I just put one into a RCA 31" and it works nice. Don't throw away the TV. Get it fixed. MAKE SURE YOU INSIST THEY USE THE GENERIC ONE! THEY DO WORK!