Question about Sony KP-51HW40 51" Rear Projection Television

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Watching rear projection tv. A flash and picture went away(Black screen) can still hear program. Is there an easy fix. tv is 13 years old

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We have a sony rear projection tv and the picture went but sound is still there. Can you give me an idea what it might be.

Posted on Oct 20, 2008

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Posted on Jan 02, 2017

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Screen went black, no picture


A clue to what is wrong is by looking from the back (taking the back off) and looking to see if the three picture tubes have any yellow glow at the bottom of them where the three identical boards are located on each tube.. If you have no glow there you possibly have a resistor R4703 open. It is a 3.3 ohm resistor and feeds the voltage to the filaments in each tube where the glow is suppose to be. If you do have the glow the problem could be much more complicated. Another to check is to see if the menu comes up on the screen. You could possibly be in the wrong input mode, Check your input mode with the input button on the remote The number R4703 is a location number to identify where the resistor is. This is all I can tell you that would not require much more complicated procedures requiring a tv repairman to look at it. If you have an ohm meter you can check R4703 but it must be checked out of circuit. (or at least one leg loose) Hope this helps

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NO PICTURE


The leading cause of this type of failure is convergence.. Replace both convergence Ic's Stk392-110 and check all 2.2 ohm resistors in that circuit... This repair on this particular unit is fairly easy because the convergence amps are mounted in such a way to easily remove the left board for field servicing...
Have a great day!
Bill

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