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My six year old 42 inch Sony was fading to blue- then after two or three minutes bringing back the picture.this happened every time I turned it on. Now it comes on-everytime, but turns to blue and turns off. Any help?

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Blue Picture Tube needs to be replaced in your TV. As its 6 years old, Blue picture tube might be available on high cost.

Posted on Aug 16, 2008

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The blue CRT could be defective on your TV or the CRT assembly.
How many times the LED blinks before shutting the TV down?

Posted on Aug 04, 2008

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My Vizio LCD TV screen fades to dark. Sound stays on.


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Fading blue screen


You may have a bad blue picture tube but there is a way to deal with this first---This is a 2003 model ---I did one of these with the same problem a week ago---the set has a black plastic block with six controls---three are Focus(red,green,blue) the other 3 controls are Screen controls(red, green, blue) Someone has to remove the entire piece on the front of the set below the screen(usually a plastic part) most of the time it is secured with 3 screws on either side of the set in the back; once you remove the screws the entire piece should pull out(pull from right to left(it will not fall off or come out easy--it is held in with several large plastic pegs) With it removed there is an inspection plate with 4 screws-----the screen/focus block is behind it.

You need to look very closely at the block to identify the focus versus screen controls----one row left to right will be marked Focus and the other row left to right will be marked screen------YOU need to locate the Blue Screen control(they are black like the block) With the set on(be careful) go to a video input with nothing connected---if you see a blue screen as well as the input number turn the BLUE SCREEN CONTROL SLOWLY TO THE LEFT UNTIL THE BLUE is gone.

If this cures the problem you may only be buying yourself some time----if the blue picture tube is bad sooner or later this trouble may return----I have seen sets where this was adjusted and the set worked for a year or more with no repeat of the trouble----replacing the blue tube would likely cost you 400 - 500 parts and labor.

IF YOU HAVE ANY QUESTIONS OR NEED ADVICE LET ME KNOW- I am here to help people.

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My Sony 54" Grand Wega rear projection TV is 4 years old in Sep. It has started losing picture and sound for a few seconds then comes back on. It is getting more and more frequent. . . like six times in 5...


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Sony Trinitron K29 inch CRT TV screen shows green shade!


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SONY KP-57HW40


you are experiencing one or more of three things
1.the crt itself is damaged
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Blue snowy pixel areas on my plasma


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FADING TO BLUE SCREEN


Sounds like you have a problem with the blue gun in your picture tube or its drive circuit. You might remove the back cover and gently tap on the neck of the picture tube using a plastic screwdriver handle while watching the screen in a mirrow. If the picture flashes back on or on and off then the picture tube is the problem. If this is a projection tv you have three separate tubes : red, green & blue. you'd need to tap the blut one.Gently!!!! Stargazer

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1 Answer

KEEP FADING TO BRIGHT BLUE SCREEN


I'm about 90% sure it is the blue picture tube developing an intermittent heater to cathode short. I'm surprised the set isn't shutting down shortly after this happens. A service call will tell you for sure as it could also be a bad solder connection causing a similar symptom. My own procedure to check it out would be to GENTLY tap the neck of the suspected picture tube with a screwdriver handle to see if I could get it to come and go (Or get out my CRT tester and measure it with the power off). Obviously by holding the screwdriver blade you don't want to accidently short anything out as there is about 33,000 volts a few inches away from where I would be tapping. Nuff Said.

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