Question about Sony FD Trinitron WEGA KV-27FV310 27" TV

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SONY KV-27FV310: UPPER HALF OF SCREEN IS BLACK. Bottom half of the screen is normal. There is a white bright 1/2 inch horizontal line (just in the middle of the screen) that separate black upper half and normal bottom half. This TV was bought in 2003.

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  • Anonymous Nov 18, 2007

    My problem is the same as vova's - the top half of the screen is black, the bottom half is perfect and there's a white line between the two. I called the cable company and they said it's the tv and not the cable box. It's Saturday night so I have to wait until Monday to do anything.

  • Anonymous Mar 23, 2008

    Ya same problem here... did either of you two get it fixed or did you just end up buying a new one?

  • cdiesse Jul 05, 2008

    yes ! Same problem here ... I think Sony have pre programmed his TV trinitron tube to die after 3 years ... Hope there is a solution, but I don't trust Sony anymore for long life material.

  • skhusain Oct 21, 2008

    SONY KV-27FV310:
    Bottom half of the screen is normal.
    There is a white bright 1/2 inch horizontal line
    (just in the middle of the screen) that separate
    black upper half and normal bottom half.

  • Anonymous Oct 25, 2008

    Same problem with my TV. Top half is black with botton half OK. I have called in a repairman. Will let you know what happens.

  • Anonymous Mar 14, 2014

    there is a black line when it is on one side shows the show the other side is purple

  • Anonymous Mar 25, 2014

    sony klv bx300 has horizontal lines at bottom of screen and a double picture



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You have a vert sweep problem and unless you know how to trouble shoot this cuircit bring it to a pro. I found out mostly in these sets that the vert output IC is bad.. Also sometimes the b+ filter cap off the fly is leaky and made the IC to fail. Another thing is Im surprised to hear you got a pic with the vert failure and a bright line in the pic!! This could be a big problem when the sets fixed so dont run it too long like this. It could burn a line all the way across the screen and you will see a dark faint line in your pic because of this. BE CAREFULL!!

Posted on Mar 25, 2006


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Posted on Oct 25, 2008


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1 Answer

I have a Sony FD Trinitron 27' Model # KV-27FV310. It is approx 8 years old. After turning it on and watching a full screen for a few minutes; all of a sudden, a line came across half the screen;

top half missing is in vertical circuit of set---if it is a 27 inch and this old consider retiring it and replacing----other option is consider having a shop repair it--a rough guess would be as high as 150 dollars parts and labor is possible for your problems.

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The top half of picture is completely back, please

you have a vertical problem it could be a cold solder joint on the vertical out put ic or a component failing in the circuit
if you have the tools a soldering station and some know how you can fix this

or you may want to contact a local for help with it

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Horizontal hold IC and circuit is failing The remote signal will cause it to spasm because of this faulty set of parts. It needs professional intervention to fix this properly

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Maybe you got dried capacitors near the vertical IC or the IC himself are damaged you need to be atech for make the rapair because is dangerousli make it

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Only bottom half of the screen shows, also i need the service menu. How can i get to it. Thanks in advance!

I'm not familiar with this model of Sony, but the picture shows a CRT TV. If this is so, your vertical deflection circuit has gone bad (it's nothing to do with the service menu). This can be caused by bad capacitors in the vertical deflection circuit, a bac IC, bad power supply to the IC, bad solder connections, or a combination of any of the above. In this case I would use a scope to test the circuit to see where to start from. You can always do a visual inspection to check for blown or burnt parts and bad solder connections. Other wise you'll have to have a sevice person look at it.

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The half picture is a verticale problem. This is difficult to repair. Send to a repair shop.

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It's called a loss of vertical deflection. In this particular model your set uses a TDA8172 for a vertical Ic, at board position Ic561.
Replacing that and check or replace the feed cap out in front as needed should restore full deflection. It's not an expensive fix for a qualified shop either.. But my advice is take it into them and save the pu/del charges. And call around to see if they have the Ic on-hand and about how much it will be to replace it before choosing the shop to take it to..
Let me know how it goes!

Nov 22, 2007 | Sony FD Trinitron WEGA KV-27FV310 27" TV

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Sony TV - Loss of half the picture

sarge, it sounds like the vertical output IC went bad on you. If it was a bad connection or a bad capacitor, your picture would have been a straght line across the screen. They call the output section of the IC a push-pull type of amp, so the top half of the sweep IC went out. If you have had some soldering experience, and or experience with solid state repair, locating the bad IC and replacing it is no big deal. If you havent, stay safe and call in a pro to assist you in this repair, as there is alot of high voltage inside this puppy that is still present even if the set is unplugged. It should not cost an arm or a leg to repair this set. An honest repair on a set like this if you take it in should not exced 125 to 150 bucks. Good Luck PS Please dont forget to rate this thread.

Oct 22, 2006 | Sony FD Trinitron WEGA KV-27FV310 27" TV

1 Answer

Top half of screen black

The vertical circuit is going bad,this is the one in charge of opening the picture up and down,try taping on the side to see if the picture reacts ,if it does your set has a loose conection and the vertical IC will need to be resoldered only but if it does not react the IC will have to be replaced,if you are familiar with tv service this will give you a place to start but if you are not be safe and seek the help of a servicer,please let Us know how it goes.

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