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Samsung plasma tv bottom half of screen keeps blacking out but clears with a thump on the back

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Badly connected flatcables on the x and/ or y sus. panel

Posted on Jul 27, 2009

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Electronic tech needs help this tv only half of picture is showing what could be the problem i wants to fix it myself


Hello Danyell,
According to the model number you provided you have a 42" Insignia plasma TV. The problem you reported with having just a blank black screen on the lower half is due to a bad lower buffer board or also called a lower scan board. The part number is LJ92-01739C and if you Google this part number you can find these online and also find some sites that may show a short video on how to replace it. Price of this board looks to be about $35. Also of note is you will find that this part number is a Samsung part number which means your Insignia TV has a Samsung plasma panel in it so the associated circuit boards will also be Samsung parts.

May 02, 2014 | Insignia 42" Flat-Panel Plasma HDTV

1 Answer

Screen was going red on the top half of the screen, then..


The Y buffers were going bad, sounds like they went , you should get the Y upper and Y lower also the Y main. be aware the screen may be bad but tou won't know till you try the Y boards,

Jul 23, 2009 | Samsung HP-R4252 42 in. Plasma HDTV

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Bottom half of screen is black


its ur diaplay problem.. go for a change of new display...

Jun 30, 2009 | Samsung HP-R4252 42 in. Plasma HDTV

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52" Samsung that the top half of screen goes black.


the HDTV has a heat-related problem check your fans. Do they remove heat? the vertical chips paint the screen from top to middle and, middle to bottom so; your top to middle vertical chip is overheating as is your video chip; that is why you have "glitter" in the back ground. get rid of the heat or, bye,bye TV.

May 20, 2009 | Samsung HP-R5072 50 in. Plasma HDTV

1 Answer

Fault with Samsung PS42S5H


sounds like the lower y-sus buffer! take off the back and give me the pcb number should start with Lj92

Nov 03, 2008 | Samsung PS42S5H 42 in. HD-Ready Plasma...

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Samsung plasma TV, half screen is blacked out


Well, as per my last posting, I thought I would share. The problem of the bottom half of my 42 inch Samsung Plasma blacked out - meant a trip to the local TV repair shop. I have to say, they were great. I took it in and they were able to fix it after replacing a part - had my TV back in about a week. Cost was approx. $300. This was well worth it, considering how much I had paid for this TV only a few years ago. I had the repair done last month and so far, it's been great. Sorry, but I can't remember the name of the part.

Aug 10, 2008 | Televison & Video

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Screen Problem


I have been trying to fix one of these tvs and found out from a repair man that the lower half going blank means a problem with the lower buffer. and that is also what the manual I downloaded says.
have you checked that?

Dec 07, 2007 | Samsung HP-R4262 42 in. Plasma Television

1 Answer

Samsung PS42S5hX - Bottom half of screen flashing black sometimes permanent, does not do this all the time.


might be y drive board bottom half it connects to the y sus board usually on the left side if your looking at the set with the back off

May 27, 2007 | Samsung SP-R4232 42 in. Plasma HDTV

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