Question about Samsung PN50C450B1DXZA 50-inch Class Television 720p Plasma HDTV

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I had 3 horizontal black lines on my samsung pn50c450b1dxza. i replaced the y buffer board. there was no picture but still sound. when i put the old y buffer board in the picture works again, but still with the horizontal lines in it. is the new board i ordered defective? or is there another problem?

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  • Tony Nov 03, 2012

    Or is the wrong pc board.Check the vertical, can you adjust that?

  • edward allen Nov 03, 2012

    the part number matches. i'm new to doing this...how do you mean to adjust the vertical?

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6 Suggested Answers

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Posted on Jan 02, 2017

zjut
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SOURCE: R4252 No picture, sound OK Y-Drive buffers overheating

Try to replace the Logic Board, about 50% chance to fix the problem.

Posted on Jan 04, 2008

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SOURCE: Black horizontal line 1 pixel high

Depends on what area the line is in the bottom half or top?

Posted on Mar 10, 2008

  • 1 Answer

SOURCE: Samsung HPR4252 with red horizontal lines accross the screen

I just had my HP-R4252 repaired on 12.05.09 with a similar problem. The picture is covered in horizonal, broken lines and the color is predominately red. They lines are grouped together in large bands across the screen.

The tech replaced the Y-Buffer boards (Up) and (Low) in about 20 minutes.

Samsung BN96-02034A BOARD, Y BUFFER UPPER ASSY
Samsung BN96-02216A BOARD, Y LOWER BUFFER ASSY

Posted on Dec 06, 2009

  • 11 Answers

SOURCE: no picture, just sound, blown y buffer board twice1

a4.. there are 2 of them, upper and lower buffer boards.. they control the top and lower half of screen devided horizontally, i have had many run ins with these sets. and usually the buffer boards arent cheap.

they plug into the ysus( y sustain).. its possible your y sustain is blowing the buffer moduals because one of its i.c.'s under the heatsink has popped on ya.. effectively creating a short that blows the buffer boards.
remove the buffer boards, turn tv on... feel the 2 silver heat sinks on that y sustain( beware dont zap urself.. just the tip of your finger on the heatsinks)

you may find that one is cold and one is hot...if so, you need a new y sus and probably to replace the buffer boards the a4 upper and a4 lower.

If you get a new ysus.. plug the a4 upper and lowers into it, look at your picture.. if ur missing the top half the top buffer is blown or lower half the bottom buffer is blown. or..no picture they could both be blown..an easy way to tell if u have no picture to diagnose is..touch the heatsinks that sit over the chips on the buffers..if they are red hot.. they are bad and shorted internally.

Posted on Dec 11, 2009

  • 53 Answers

SOURCE: My tv Samsung HP-R4252, have Y-Main board

Do you have more specific information on your set, such as the full product model? Such as: HP-R4252X/XAA? What about the version?

This can help, because--as of right now--you are telling me that you put that Philips part into your Samsung TV. The LJ41-02759A is made for a range of Philips sets. They may work, don't get me wrong, but the part # for your Samsung set is: BN96-02033A

I don't have both these boards in front of me, of course, so I can't tell you if they cross or not.

Hope this helps.

Posted on Jan 22, 2010

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1 Answer

How to fix Black Horizontal Line on Samsung Plasma TV (PN60F8500)


It is possible that the buffer board will fix your problem, but try removing, cleaning and reseating the flex cables between the buffers and the panel first. All it takes is a little bit of dirt or oxidation to open a connection and cause a line-out condition. Use a lint free cloth and a little bit of alcohol to clean them. Make sure to fully insert the cables and center them perfectly in the connectors or you will have even more lines. If the original line is still there after cleaning, then try replacing the board. Buy a board from a reputable dealer that will guarantee no problems with the board. If you still have the line even after changing the board, then the plasma panel has failed and the only fix is to replace the panel.
Always let the tv set for an hour unplugged before attempting any repair work. There are dangerously high voltages in plasma tvs that can cause severe shocks or even *****.

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I am trying to troubleshoot a Samsung Plasma TV, model pn50c450b1d with no picture. have replaced the Y main board and the Y Buffer board. Still no picture.HELP


If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
Faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.

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Here's a link to order the original the JVC upper Y-buffer board and lower Y-buffer board for this model from a major parts distributor if needed:


JVC "PD-42DX6" Replacement Part Upper Y - Buffer Board (LJ41-02760A)

JVC "PD-42DX6" Replacement Part Lower Y - Buffer Board (LJ41-02761A)

Based on the symptoms: It is possible that the Y-buffers are faulty, which may require the replacement of the Y-sus board as well. You may want to get a local technician to diagnose the unit and provide a second opinion.

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1 Answer

Screen Problem


hi....Your tv picture is managed by several boards, the two specific ones are the ysus and the xsus. The Y controlls the horizontal pixelation and the X the verticle, if you are having horizontal problems then its the Ysus thats faulty, on this particular set, the Ysus board has two accompaning buffers that are particularly troublesome. I've had more than one of these sets in the shop recently with the same ailment.Sounds like your buffers are starting to go out. The screen is split horizontally by the two long skinny buffers attatched to the Y main, if the bottom one has one leg in the grave you'll be getting a partially black screen or no picture at all. The colored lines running through the screen are more typical of a failing buffer. Are you interested in taking this set apart and putting a couple hundred into fixing it?  When buffers go they usually take the Y main too. Worse case scenario you're gonna be out about $350 dollars to fix it yourself. Best case, a ribbon is loose on the bottom buffer and with a dismantle you'll be able to connect it again..

thank u rate me!!

Feb 12, 2009 | Philips 42PF9630A 42 in. Plasma Television

1 Answer

The lower half of the screen goes black,with a whack to the left side of the unit,the picture comes back.Also, the top 4 inches of the screen continues to have colored lines running across it,which will...


Your tv picture is managed by several boards, the two specific ones are the ysus and the xsus. The Y controlls the horizontal pixelation and the X the verticle, if you are having horizontal problems then its the Ysus thats faulty, on this particular set, the Ysus board has two accompaning buffers that are particularly troublesome. I've had more than one of these sets in the shop recently with the same ailment.
Sounds like your buffers are starting to go out. The screen is split horizontally by the two long skinny buffers attatched to the Y main, if the bottom one has one leg in the grave you'll be getting a partially black screen or no picture at all. The colored lines running through the screen are more typical of a failing buffer. Are you interested in taking this set apart and putting a couple hundred into fixing it? If so, comment and I'll post pictures of the dismantle and the buffers you're likely going to have to replace. I can also recommend where to get them but this fix isn't cheap. When buffers go they usually take the Y main too. Worse case scenario you're gonna be out about $350 dollars to fix it yourself. Best case, a ribbon is loose on the bottom buffer and with a dismantle you'll be able to connect it again, but seriously, when in life has the answer ever been the best case scenario? Maybe your luck is better than mine.

Jan 31, 2009 | Philips 42PF9630A 42 in. Plasma Television

7 Answers

Samsung HPR4252 with red horizontal lines accross the screen


I just had my HP-R4252 repaired on 12.05.09 with a similar problem. The picture is covered in horizonal, broken lines and the color is predominately red. They lines are grouped together in large bands across the screen.

The tech replaced the Y-Buffer boards (Up) and (Low) in about 20 minutes.

Samsung BN96-02034A BOARD, Y BUFFER UPPER ASSY
Samsung BN96-02216A BOARD, Y LOWER BUFFER ASSY

Feb 05, 2008 | Samsung HP-R4252 42 in. Plasma HDTV

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