20 Most Recent LG DU-42PX12XC 42 in. Plasma HDTV - Page 7 Questions & Answers

Check the controller board, 6871QCH038A. This board is one layer deep into the assembly after the cover is removed. Gently lift the covering circuit board back plane to access.

To do this direct a blast of cold air unto the large chip in the center of the board. If the picture comes back on then you have found it. This means powering the TV while open and this means danger to the novice. Voltage can end your life when you become the circuit path.

Order Part number 6871QCH060Q as the suitable replacement part to this circuit board.

7060 State Road 84 #12
Fort Lauderdale, FL 33317
(800) 432-8542
Fax: (954) 723-9044

Your module is available at Encompassparts.com for $123.47
The new # is 6871QCH038C

The short answer to your question is yes.
Replacing the boards will correct your problem - however taking the tv to a local tech will save you some money.
There are capacitors on the board that can be replaced and save the board.

This is a common component failure for LG and Samsung.

Look at a pretty much all labor repair of around $200 vs. purchasing the boards at about $150+ea. depending on your source.

Thanks for using FixYa!!

What board did you replace? Sounds like you're got a problem with your X-drive board(s).

Pop open the back and double and then triple check all your connections and make sure they're good and tight. Especially those TCPs at the bottom that plug in from the screen itself. 

hi there. I have this same TV, and the exact same problem. Last night, i was playing around with it, took off the entire back of it to see if I could fix it. After a few minutes of tinkering, I found that if I apply pressure to the TV in a specific way, the left side of the picture comes back. Here's what I did: standing in front of the TV, I hold the top of it, in the middle with my right hand, and the upper left corner with my left hand. Then, I gently apply pressure, forward (away from me) with my right hand, and backwards (toward me) with my left hand. Sort of like trying to "bend" the screen. At some point, the picture comes back .. . the problem is, if I let go, then the colored lines come back . . . maybe one can mount it on a wall in such a way that the pressure is still there . .. i haven't tried. That's all I got.

Hi,

It seems that some parts are having a problem by warming up the temp.
If you're a technician, try some coldspray on the capacitors of the power supply.

Cheers,
Gerard

Well if it's old it can be burnt in from something being on there for too long. The inside of the T.V.'s have plasma gases and they can run out uncontrollably too. Sorry, but you can't do anything.

Yes, the "PIP" is the display of multiple channels at one time. On your remote you need to go to the zoom pip button and press it, if nothing go to the meno then look up the "PIP" tab and go there to try to zoom out.

You can do the repair yourself, you need about 3 hours to take apart and re-install. Keep a note of every screw, there are alot of them.

The board may be stuck on by some di-electric grease so pry it off carefully making certain all screws are off, check behind wires etc...

Replace with 6781QCH038C not the 060Q it will not work with LG's but will work for Vizio's

Hi

You have defective vertical output IC. and 1.5ohms resistor. this two parts need to replace a new one.
No other...

Thanks!

I have a Vizio P42HD but once it is taken apart, it is all LG components.

It is your Power Control Board 6871qch038a. The solders are so small it isn't worth trying to re-solder.

Spoke with PartStore.com, rep stated 6871QCH038C (038C) is the superceded replacement for the defective prone OEM 6871QCH038A (038A). They and others offer the 6781QCH060Q (060Q) for $50 - $100 more. I opted for the 038C, but I was concerned about the title of the part which states "HAND INSERT"... PartStore.com rep stated it is in fact a board and there is no soldering needed, just "plug and play". DONE, paid only $120.95 + next day shipping for $29.95.

Since I took the TV apart before, it was a breeze and took about 2 hours, start to finish.

Important note, remember to remove the two 1" square spunge type heat sinks/pads the new board needs those for a proper installation and protection of the certain component.

Also you need two small zip ties to replace the ones you are going to clip off.

Added Bonus, the new board fixed other issues:

1. At times I would get a squeegly red line go across the screen. I thought it was the source (cable) but it is gone now.

2. Screen Shift, when I use the XBox for Games or DVD/HDVD the screen would shift. Very annoying, prior to swap out, recently the screen started to shift watching cable. Now it is no-longer an issue.

I am really pleased with my DIY repair and wanted to share.

The damn Vizio Out of Warranty Service wanted $360 for a service call which included the part for $125 plus they take my bad board for exchange.

6871QCH038C $120.95 http://www.partstore.com/Part/LG+Electronics+Incorporated/LG+Electronics%2fZenit h/6871QCH038C/New.aspx
Over Night Shipping #29.95
DIY FREE

If it's new you should be under warranty.

If not, you need to replace the Power Control Board 6871qch038a

My Plasma is a VIZIO P42HD but all the components are LG.

Spoke with PartStore.com, rep stated 6871QCH038C (038C) is the superceded replacement for the defective prone OEM 6871QCH038A (038A). They and others offer the 6781QCH060Q (060Q) for $50 - $100 more. I opted for the 038C, but I was concerned about the title of the part which states "HAND INSERT"... PartStore.com rep stated it is in fact a board and there is no soldering needed, just "plug and play". DONE, paid only $120.95 + next day shipping for $29.95.

Since I took the TV apart before, it was a breeze and took about 2 hours, start to finish.

Important note, remember to remove the two 1" square spunge type heat sinks/pads the new board needs those for a proper installation and protection of the certain component.

Also you need two small zip ties to replace the ones you are going to clip off.

Added Bonus, the new board fixed other issues:

1. At times I would get a squeegly red line go across the screen. I thought it was the source (cable) but it is gone now.

2. Screen Shift, when I use the XBox for Games or DVD/HDVD the screen would shift. Very annoying, prior to swap out, recently the screen started to shift watching cable. Now it is no-longer an issue.

I am really pleased with my DIY repair and wanted to share.

The damn Vizio Out of Warranty Service wanted $360 for a service call which included the part for $125 plus they take my bad board for exchange.

6871QCH038C $120.95 http://www.partstore.com/Part/LG+Electronics+Incorporated/LG+Electronics%2fZenit h/6871QCH038C/New.aspx
Over Night Shipping #29.95
DIY FREE

6781QCH038C is the correct replacement.

There is another replacement part for LG's ending with 060Q. Electronia-USA.com stated it may not work with LG's but does work for Vizio's

Yes, a non pro can do this repair.

I have that part. [email protected]

I had the same problem on my DU-42px12xc. Red, green , and blue lines vertically on the right side of the screen. I found a loose solder connection under the inputs board on a resistor. After re-soldering, everything was crystal. I'm happy I grabbed this tv before my work threw it out. Be very careful when soldering SMT components. Use proper equipment. I had to troubleshoot while the tv was on, so I was extremely careful not to short anything out.

I pulled the inputs board out to gain access to the "Y-axis" pins.
resistor located under the inputs
I started pushing on the resistors 'till the color lines started working correctly, and re-soldered the four resistors.

try painting on screen to create a picture