Originally Posted by powrwrap
They are sending out a tech at no charge to my house on Wednesday. I think the problem with YouTube and 3D apps stopping, freezing, restarting, etc. is because my TV drops the wireless connection with my router.
The tech came out Wednesday afternoon. He explained there were only two things to try: 1. Update the software to the latest version and, 2. Replace the main board. His reasoning is that there isn't anything else to try--the WiFi receiver is on the main board and the software update was supposed to address improving the WiFi reception. He said that updating the software had fixed others who had the problem with YouTube videos freezing. I explained that I couldn't get the latest software update because it wasn't available in my area. I told him I know there are newer updates available from reading internet forums. I asked him if he could force my TV to find a newer software update by accessing the service menu. He replied that he didn't think that was possible, had never heard of doing it that way. We tried to update the software using my Magic Remote but there was no newer version available. Then he pulled out a conventional remote and attempted and, incredibly, it showed 04.12.23 was now available. However, attempting to download it didn't work as the TV couldn't hold onto the WiFi signal. A Catch-22.
So he replaced the main board. Ladies and Gentlemen, behold--the entire guts of the 55LM7600 HDTV:
[click on image to enlarge. TV is lying screen down on a blanket on the floor.]
There are two boards on the TV. The smaller, green board is the main logic/tuner/input circuit board and the larger light brown board in the center is the power supply. It took him only about 15 minutes to do the operation to replace the board. After hooking everything back up we attempted to upload the new software update. My TV was starting to download it and it got stuck at 3%. This was after about 10 minutes.
While this was going on I asked him about the flashlight and light bleed problems. I demonstrated my set by putting it on a setting where there was no signal. He said I had one of the better sets with very low light bleed. I asked him about the supposed fix where you loosen the screws and retighten to attempt to alleviate the light bleeding. He said he didn't think that could possibly work because the screws don't mount into the actual LCD panel (we talked about this when he was taking the back cover off the TV.) BTW, the back cover is an extremely flimsy thin stamped piece of metal. If you look at the photo above you can see the various screw holes in the metal band going around the perimeter of the set. I told him about the supposed fix whereby you apply finger pressure along the perimeter of the set where the light bleed occurs. He seemed skeptical of that method as well, although I swear it has worked (marginally) for me.
I asked him if he could activate the Digital Dolby setting from within the service menu and he said he had never heard of doing it that way. He said the set would automatically sense if there was surround sound and send the proper signal to my stereo amp.
We tried to update the software again and it got stuck again. At this point the guy had to go to another appointment. He said to let the TV try to update and if it doesn't I should grab the update from the LG website. After 15-20 minutes the TV just wouldn't complete the update. This time it got to 4%. At this point I began to suspect my wireless router and started tweaking its settings. Eventually I was able to get the software to update. I notice faster switching from watching TV to the Apps menu, an improvement. Playing YouTube videos is better, but it is still plagued with the videos stalling and buffering on some files. On other videos I'm able to get through them, something I could never do before. If I do the signal strength test within the VuDu app I get into the highest tier of strength, sometimes greater than 9 MB/sec. When using the Settings Menu on the TV and I select Connect to Network and select my router it shows 3 out of 4 bars for signal strength.
At this point I'm going to fiddle with my wireless router some more, although again, my son's PS3, less than a foot from the TV shows 100% signal strength with 9Mb/sec download speeds. Laptops placed near the TV work fine. If I can't get stutter-free playback with YouTube I might just buy a cable modem and hardwire the TV to the internet via an ethernet cable.
So I have a new main board. My old one had 1,100 hours on it. I had to re-enter all my custom settings again, including Expert1 picture settings.Edited by powrwrap - 10/18/12 at 11:12am