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I can't get anything on the screen but blue. I need to get to an o3

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Require make and model #

Posted on Aug 23, 2008


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Posted on Jan 02, 2017


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I have a o3 jvc 56 in model number av56wp74. I have a horizontal blue line across the front of my screen. Do I need convergence kit or dlp lamp ? How much would each cost? And is it woth fixing?

The model listed is fairly easy to repair if a convergence issue.(DOES NOT USE A LAMP-HAS 3 PICTURE TUBES.

The entire front grill below the screen is held on by the two tiny screws at control door on front and more on either side at rear--with it free you can remove the grill.

Behind it is an inspection plate---the board with the metal heat sinks directly behind it up front is the convergence board.

Set uses two of the STK-392-110 CHIPS--cost of parts (chips etc) will be under 30 dollars total(Suburban Electronics is a good source)

The board will come out (if attempt this I can tell you what and how to get it out) chips each have 18 pins and are soldered in place.

Just so you know what the board looks like here is a photo of it removed from a set I fixed.



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1 Answer

There is a message on screen F-O3

That code means "Wash Thermistor open/short circuit - book a washing machine repair"

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Have o3 suburban. turns over does not start

out of gas or fuel pump over heating

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Ozone smell

When the unit is clean it will produce more ozone. If the unit is a bit oversized then it becomes worse. As an installer I have to be carefull to not oversize these units. O3 is harmless and actually will only stay in the air as O3 for about 1/2 hour. Because of this it will not build up in the air. O3 also in a powerful disinfectant and will help kill mold and bacteria in the air. As soon as the filter gets a little bit of dust on it the O3 production will become much less. Run your fan continuously for a day or so and it will go away.

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Lancer 2003

If you have a test light test to see if you have power to the fuses if so bad grounds it sounds like a wiring problem not not mechanical

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Blue crt assmbly maybe?

its very possible that the blue CRT is horting the set out. Heres how you can test it. Remove the speaker grille and access panel behind the grille and you will see the crts. remove the blue crt circuit board from the end of the blue crt and make sure it isnt touching anything then try powering up the set if it doesnt shut down then you have found the problem and you will need a new crt. or you can switch the blue circuit with the green and try it iwth the blue on green and the green on the blue then if the screen turns green before shutting down you will know that its a problem in the blue drive circuit and not the crt. lety me know if you need further assistance.

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Card Error

Camera says card error-blank blue screen behind it and it won't let me do anything.

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