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I need to replace the buffer and main board - LG 60PV250 60 in. Plasma HDTV

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Blinking blue power light


check buffer boards for blown chips but before check main board for puffed up capacitors need to replace bad capacitors on main board usually 3300/100v ones bigger ones on board then check buffer boards for blown chips usually bottom buffer board

Aug 05, 2013 | Hitachi P50H401 50 in. Plasma HDTV

1 Answer

Have bad lower y buffer should I replace main board also


Lower and upper buffers should be replaced together. No need to replace the main board.

Sep 20, 2012 | Hitachi 55HDS69 55 in. Plasma Television

2 Answers

LG 42 inch plasma. Half screen is ok (rh side) other side black


Buffer boards or Y-SUS main needs to be replaced. What do you mean by motherboard? The power supply board or the Logic or X main.... They YBU/YBL and the YSUS work in unison. Y-Buffer upper controls top half, Y Buffer lower control bottom have YSUS controls both of those. There is also D, G, E F boards that can split screan. But they to are controlled with the Y-SUS Main. Hope this helps...

Jun 29, 2010 | LG 42PC1DV 42 in. EDTV-Ready Plasma...

4 Answers

HPT5054 50 in. HDTV-Ready Plasma Television: Samsung HPT5054X/XAA - No picture, Sound OK, Have ...


It's not the x main. 90% of the time it's a y buffer that goes out. It's usually the top buffer. 3/4 of the time the buffer takes out the y main board too. You cannot just replace the y-main or buffer because it will just burn out the other within seconds. Also about 1/4 of the time it'll take out the top transformer on the power supply too. The solution? First disconnect the power to the y main board. turn on the television and check the voltages coming off of it. Careful it's high voltage 208V! Remember it's DC too. Then disconnect the buffers from the y main board. You can try powering the y-main up to see if the little LED lights up. This does not indicate it's working though but it'll tell you if it is possible to fix. The fixes for these boards is only for electronics guys. It usually involves replacing 1-3 capacitors and 1-4 FET's. Since a bad buffer can take out a good y main in seconds it's usually recommended that one replace all 3 boards at the same time. It's a $250 fix. How do I know all this? I've now repaired 5 of these televisions. I owned one and spent close to 600 repairing it. I bought misc parts and broken sets online for months before I had 2 different repair guys walk me through the process of repairing them. I had so much cash tied up in parts that I bought 3 more dead sets and repaired them to justify all my spending. I've never had an x board fail. I've had EVERY top buffer fail. I've had all but 1 y-mains fail. and 1 lower buffer fail. I've also had the y buffer fry it's top chip, blow a capacitor and FET on the y-main, and fry the top transformer on the power supply before my eyes. It only took 5 seconds. Replacement of the 3 y boards will almost always fix the sound but no picture problem. Hope this helps!

May 16, 2010 | Samsung HPT5054 50 in. HD-Ready Plasma...

1 Answer

I get just half a picture and it is always on the top half, the bottom is black or hazy colors


You will need to replace the Y Buffer boards. If you are looking at the back of the set, the Y-main is to the left. Connected to this board are the upper and lower buffer boards.

They control the top half and bottom half of your picture.

Replace those, and you should be fine.

Please note that it is possible for the Y-Main and/or the Panel itself have caused these boards to fail. Replacing the Y-Main might be within a reasonable cost, but replacing the panel is not worth the cost.

Jul 29, 2009 | Sanyo DP42746 42 in. Plasma Television

1 Answer

42" Sanyo HD Plasma TV (Model DP42746)


Scott,
Not at all crazy! The Samsung/Akai lines seem to have numerous problems with their Y and Z sustain boards and upper/lower Y driver boards (aka buffers). That and power supplies are generally the largest percentage of the problems in those units. That said, I'm a bit confused looking at the p/n you referenced. I don't see that as being a Samsung number belonging to a Y-sus board. Usually they start with BPxx-xxxxxx..
Lastly, while you might have every ability to replace the Y-sus board if the buffers are bad and you don't replace them you could simply burn up the sustain board when you power it up... Installing the buffers is a bit more complex than the sustain board so be really careful there...\
Good Luck
Bill

Jun 05, 2008 | Televison & Video

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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