I fixed the blue line problem on my LG Plasma HGTV today after replacing a circuit board, but now Dale Earnhardt Jr’s car is orange!
After removing all of the screws holding on the back cover of the set, It took a while to figure out the easiest way to get the to board I needed to replace and remove the fewest wires and other components as possible. I ended up removing all of the wires on the rear-most panel except for the power connector lines that were located on the bottom right.
The board swung freely so that I could get my tools and hands behind the left side.
Replacing the board wasn’t a big deal except for the little swing connectors on the two wire harnesses at the bottom. After I figured out how they worked, it was easy, but I did break both of the ones on the old board trying to figure out how to get the wires out. Basically, it the locks are on a hinge and swing up and down. When down, they pinch the wires in the correct place.
I put the whole thing together and the sound was great, but no picture. After sitting there a while thinking about all of the wires I unhooked, I remembered one that I forgot to put back in place. After removing the back of the TV again and connecting the wire, everything worked great.
NOTE: Dale Earnhardt Jr. is driving an orange car this weekend.
The mostly persistent thin blue line on my 5-yr-old LG plasma TV.
Well, I’m going to try and repair my LG Plasma HGTV. The model number of my LG Plasma is DU-42PX12X.
Here’s the story…
A few weeks ago, my 42″ LG Plasma HGTV began to occasionally display a thin blue line on the right side of the screen. It would appear for a while, then disappear for a while. We are now going on about 5 weeks and it is always on the screen now. It is about 1 inch wide and is about 6 inches from the right side of the screen.
Of course, the first thing one does these days when something like this happens is to hit Google.
Apparently, after reading only a few blogs, I have been lucky. Many LG TV’s purchased in 2004-2005 had this problem after only a couple of years and most of the blog posts are from a couple of years ago.
I got away without the problem for 5 years.
After checking out only a few Google results, I landed on a blog post that had very detailed instructions on how to fix the problem. The comments on the post were lengthy and most people who followed the instructions sucessfully fixed their TVs.
So, this morning, I ordered a LG Electronics / Zenith “Hand Insert PCB Assembly” – part number 6871QCH038C from partstore.com. The part should be here by next weekend.
I’ll update this post when it arrives and let everyone know the outcome.
UPDATE: Transplant surgery on the 42″ LG Plasma HGTV was a success, fixing the 1″ blue line running down the right side of the screen.