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The bottom half of the picture goes black intermittently. sometimes it resolves itselt, sometimes you have to smack it

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That you have to " smack it " could mean that a cold solder joint on the board proberly out of the vertercial output. To test, while the TV is on use a long plastic or wood tool and push on the board. Sometimes you may have "resolder" EVERY joint, ground, wire connection in that circuit.

Posted on Jun 14, 2008

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RCA serial 137651043, model P52939, 55 inch tv.


Half black? top/bottom or left right?

The set is rather old--a old trick to use is to connect a fan to the rear of set with the back off--it may extend the life of the set and give you some more use out of it.

I have seen a lot of these sets and never one with the problem you describe. If only a picture top or bottom is missing it may be vertical or if you are seeing what looks like a full picture with top or bottom black it is a Blanking problem--may not be easy to find...........

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1 Answer

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Bad flyback transformer. It has a short in the winding making the Horizontal output transistor heat up so when its too hot the set goes into protection.

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1 Answer

Picture Flickering


The sony tuners have been known to get intermittent, it might be a bad ground where the tuner connects to the main chasis, If the problem is in the tuner itself it will be most difficult to resolve since the connections are so small and compacted together.
Good luck

Apr 19, 2009 | Projection Televisions

1 Answer

Picture jumps


you might have bad caps or the vertical output integrated circuit, try to locate the vertical ic and check the surrounding areas for bad capacitors.


good luck


caypianan@yahoo.com

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1 Answer

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I have a 51" magnavox plasma. after about one half hour the bottom half of the picture goes black, and u can still see the top half of the picture. what can that be

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2 Answers

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Bad solder connection in the horizontal pincussion circuit.have someone resolder.God luck.4tune

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1 Answer

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the light engine is defective and needs to be changed..this set is not that old..contact mitsubishi customer relations to see about having it done under a customer accomodation, as they have had a lot of problems with the engines

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1 Answer

Half black screen on projection tv


Sounds like the vertical area like Output, but I would look for bad caps first and resistors. In this area

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2 Answers

Help with bowing


Usually consumer described bowing is bad solder connects

on pins of convergence IC's. If the effort is made to pull the center PC board out,then replace both Stk392-570 IC's for

durability.

 

Note: V-Pin amp and pin out relates to left/right side bowed-in

  issues,a problem not usually found on your model.

Aug 30, 2007 | Mitsubishi WS-55908 55" Rear Projection...

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