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LG DU-42PX12XC 42 in. Plasma HDTV Questions & Answers
I have lg plasma i heare clicking sound when i
There's a good chance you have failing electrolytic capacitors either in the power section or the inverter section or both.
Any caps in these sections that look bulged at the top, or bulged/leaking at the bottom need to be replaced.
If you repeatedly turn it on, eventually it'll probably stay on, but every time you turn it off, the TV will get harder and harder to start up until one day it just won't.
Sometimes you have to do the opposite to start it up and unplug it for 5 mins, then try.
If you aren't tech savvy, this unit needs to go in for repair.
If you are handy with a soldering iron and can identify the power supply and inverter / FM section for the backlights, an inexpensive handful of capacitors will likely fix you right up.
Match the capacitance on the capacitors. Go over voltage if you can, and still have them fit.
IE - it's not a bad idea to replace a 10V cap with a 16V or 25V or even a 50V, but don't replace a 680uF cap with a 500uF or a 1000uF (unless you are positive it's only doing ripple filtering, and even then, you should go OVER, not under the uF rating).
Most of the caps that go are 10V 1000uF or 3300uF.
I found some great videos of the procedure (for many Samsungs with the same issue) on youtube.
http://www.youtube.com/watch?v=Mm51C_RDIZE
http://www.youtube.com/watch?v=BNHHrgX_6cs&feature=related
http://www.youtube.com/watch?v=8l0AUj8QUkg&NR=1&feature=fvwp
http://www.youtube.com/watch?v=Y7b_nTaZYcU&feature=related
As you can see, this issue spans plasma TVs, as well as large and small LCD TVs and monitors.
The parts are cheap, and skill required is minimal.
Broken TV base, can i
Hello
You can get it by ordering it, about the model number of your LG tv to the nearest LG service center. They will collect the same and give it to you. It is the only way to get this accessory. OK.
I have a red verticle
Hello; I am John at J D Electronics in Poland, Maine. I have an LG TV that was donated to me. It is a plasma
model DU-42PX12X same as many other LG models. It had 1 inch wide red and green vertical bar on the
right and a blue and yellow on the left. These bars appeared
intermittently. pressing on the control board would make the bars go
away. I have read many blogs on this problem and they all say to replace
the control board located under that huge A / V input board ( held in
by 4 screws on the large aluminum frame). The original part is #
6871QCH038A The replacement ends with a C instead of an A Aprox 90 to
135 dollars. This board is used on many different LG and Zenith models
and is a HIGH failure rate part. I like to know WHY parts/boards fail
and I found out why this board fails. There is a large square IC in
middle of the board aprx 1 1/8 inch square. This type of IC is called
BGA or Ball Grid Array. The solder connections cannot be seen , since
they are under the IC . This IC was not properly soldered at the factory
and that is why hundreds of these sets failed. I used my hot air
soldering station on it's highest setting to heat up this IC . The IC
must be directly heated from the top and some heat on the bottom of the PC
Board. Liquid flux should applied to the 4 side edges of the IC prior
to heating. The bars are now gone! To get to this board, remove all
perimeter screws and all middle screws of the back cover. The A V board
will hinge back to expose the control board if you unplug the cables to
the side inputs and the one to the button board. The set will still run
face down on a table with something to prop up the bottom screen so you
can watch the bars. If the set was run for a long time with the bars,
there will be some darkening where the bars have " burned" the screen.
This is perminent, but usually acceptable. John
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Comment:
Red stripe down the left
This is a problem with your control board. For some reason, the resistors on this board become "Un-Soldered" I'm not sure how handy you are but this can be fixed. BE SURE TO EITHER DISCHARGE THE CAPACITORS, OR AVOID THEM ALL TOGETHER (Capacitors look like little cans.They have what looks like an "X" or a "+" on the top.) Capacitors can hold a charge for a long period of time. Here is a link on how to fix this issue. I hope this helps you.http://greenrenovation.wordpress.com/du-42px12x-red-stripe-repair/
My LG flat screen has
Hello;
I am John at J D Electronics in Poland, Maine. I have an LG TV that was
donated to me. It is a plasma model DU-42PX12X. It had 1 inch wide red
and green vertical bar on the right and a blue and yellow on the left.
These bars appeared intermittently. pressing on the control board would
make the bars go away. I have read many blogs on this problem and they
all say to replace the control board located under that huge A / V input
board ( held in by 4 screws on the large aluminum frame). The original
part is # 6871QCH038A The replacement ends with a C instead of an A
Aprox 90 to 135 dollars. This board is used on many different LG and
Zenith models and is a HIGH failure rate part. I like to know WHY
parts/boards fail and I found out why this board fails. There is a large
square IC in middle of the board aprx 1 1/8 inch square. This type of
IC is called BGA or Ball Grid Array. The solder connections cannot be
seen , since they are under the IC . This IC was not properly soldered
at the factory and that is why hundreds of these sets failed. I used my
hot air soldering station on it's highest setting to heat up this IC .
The IC must be directly heated from the top and some heat on the bottom
of the PC Board. Liquid flux should applied to the 4 side edges of the
IC prior to heating. The bars are now gone! To get to this board, remove
all perimeter screws and all middle screws of the back cover. The A V
board will hinge back to expose the control board if you unplug the
cables to the side inputs and the one to the button board. The set will
still run face down on a table with something to prop up the bottom
screen so you can watch the bars. If the set was run for a long time
with the bars, there will be some darkening where the bars have "
burned" the screen. This is perminent, but usually acceptable.
Today 12/16/2010 my HDTV 42
PLASMA TVS DONT HAVE INVERTER CIRCUITS. YOU MOST LIKELY HAVE A Y-SUSTAIN BOARD FAILURE. IT IS THE BOARD TO THE LEFT LOOKING FROM THE BACK. THE LARGE ALUMINUM HEAT SINK LOCATED ON THE BOARD AND THE PART SCREWED TO IT WILL BE THE DEFECTIVE PART.
Half the screen is black and the other half is
Hello; I am John at J D Electronics in Poland, Maine. I have an LG TV that was donated to me. It is a plasma
model DU-42PX12X. It had 1 inch wide red and green vertical bar on the
right and a blue and yellow on the left. These bars appeared
intermittently. pressing on the control board would make the bars go
away. I have read many blogs on this problem and they all say to replace
the control board located under that huge A / V input board ( held in
by 4 screws on the large aluminum frame). The original part is #
6871QCH038A The replacement ends with a C instead of an A Aprox 90 to
135 dollars. This board is used on many different LG and Zenith models
and is a HIGH failure rate part. I like to know WHY parts/boards fail
and I found out why this board fails. There is a large square IC in
middle of the board aprx 1 1/8 inch square. This type of IC is called
BGA or Ball Grid Array. The solder connections cannot be seen , since
they are under the IC . This IC was not properly soldered at the factory
and that is why hundreds of these sets failed. I used my hot air
soldering station on it's highest setting to heat up this IC . The IC
must be directly heated from the top and some heat on the bottom of the PC
Board. Liquid flux should applied to the 4 side edges of the IC prior
to heating. The bars are now gone! To get to this board, remove all
perimeter screws and all middle screws of the back cover. The A V board
will hinge back to expose the control board if you unplug the cables to
the side inputs and the one to the button board. The set will still run
face down on a table with something to prop up the bottom screen so you
can watch the bars. If the set was run for a long time with the bars,
there will be some darkening where the bars have " burned" the screen.
This is perminent, but usually acceptable.
PS The black screen on one side is also related to a bad control board ! John
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