LG DU-42PX12XC 42 in. Plasma HDTV - Answered Questions & Fixed issues

If you wish to get some details; visit the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/Plasma TV troubleshooting procedure is given. Faults to all brand Plasma displays are similar.

LG DU-42PX12XC... | Answered on Feb 27, 2017 | 1,890 views

Try this link. Pick your remote. Follow the instructions.

Comcast Remote Codes Program Your Remote Control

LG DU-42PX12XC... | Answered on Nov 24, 2015 | 58 views

I'm not an expert, but I have determined that the vertical bars that are often red, sometimes blue ... and sometimes both ... are related to a bad control board. I've also read that a common fix is to buy a repair kit with includes the ysus, zsus and control boards ... all replaced together. My experience was that after a month or two with the 1.5" wide stripes, that you eventually loose the entire picture and have sound only. MIne comes back, but won't stay working for very long and the stripes are always there (buy used to fade and flicker sometimes). I'm planning on replacing the control board.

LG DU-42PX12XC... | Answered on Dec 01, 2013 | 665 views

great to know whats wrong with it

LG DU-42PX12XC... | Answered on Mar 02, 2013 | 21 views

I had the same problem and fixed it by replacing the control board. It's a little nerve wracking, but required only simple hand tools. If you'd like to see detailed pictures of the repair check out my blog.


LG DU-42PX12XC... | Answered on Mar 26, 2012 | 19,710 views

It's burnt on to the screen if under 12 months call them and replace here you go /0871-964-0113

LG DU-42PX12XC... | Answered on Dec 22, 2011 | 101 views

It sounds to me like one or more of your buffer boards has gone bad. You will probably have to have it looked at.

LG DU-42PX12XC... | Answered on Oct 30, 2011 | 881 views

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.

LG DU-42PX12XC... | Answered on Mar 22, 2011 | 266 views

unfortunately the only thing you can do is get a new tv. You can check if you still have your manufacture warranty.

LG DU-42PX12XC... | Answered on Mar 18, 2011 | 23 views

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.

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.

LG DU-42PX12XC... | Answered on Mar 18, 2011 | 368 views

T con problem with your TV.
Please get it repaired or replace the t con at dealer or tv repair shop.

LG DU-42PX12XC... | Answered on Feb 26, 2011 | 90 views

I know this post is old,
But I had the same problem.
I was able to fix it.
Heres a write up I did on the "How To".
I added pictures and diagrams too.

LG DU-42PX12XC... | Answered on Feb 18, 2011 | 1,622 views

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.

LG DU-42PX12XC... | Answered on Jan 03, 2011 | 136 views

It can be bad power supply due to bad caps, or it goes into shutdown due to shorted circuits in the Y, Z, X Sustain board. Check all the fuses and caps on all those boards first.

Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm

LG DU-42PX12XC... | Answered on Dec 28, 2010 | 82 views

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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LG DU-42PX12XC... | Answered on Dec 23, 2010 | 674 views

Look for Bad Capacitors on the power supply board they will be vented or puffed up on top. 1000uf 16v 2200uf 10v 3300uf 10v

LG DU-42PX12XC... | Answered on Dec 25, 2010 | 419 views


LG DU-42PX12XC... | Answered on Dec 17, 2010 | 165 views

Circuit overheated probably due to moisture condensation. Keep it on standby to dry off. Use it to dry off. Blow a room fan to help it dry off.

LG DU-42PX12XC... | Answered on Dec 15, 2010 | 63 views

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