I have an LG 55LV5500-UA.ausyljr that has a scrambled picture and no sound. From what I have read other places I'm thinking that I need to replace the main/logic board. Am I on the right track for this? I didn't see any capacitors that were swollen or anything like that.
LG 55lv5500 bad picture no sound
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Re: LG 55lv5500 bad picture no sound
No this model is known for faulty BGA connections on the mainboard. Take off the black heatsink off of the processor and heat up Ic 401 and 402. You can do this while the TV is on see if the picture straightens out.
Tcon board is fine. It's just doing what is toldDid I leave the soldering iron on? -
Re: LG 55lv5500 bad picture no sound
Heat gun. What I do is at the TV standing straight up so you can view the screen hit these two Ics with a bit of heat and then as you're watching the screen see if it straightens outDid I leave the soldering iron on?Comment
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Re: LG 55lv5500 bad picture no sound
There is another ic hiding underneath that black heat sync. Try that one as wellDid I leave the soldering iron on?Comment
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Re: LG 55lv5500 bad picture no sound
There are very small solder connections that break over time. Heating these up, reflows the solder, restoring the connections.Comment
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Re: LG 55lv5500 bad picture no sound
May not last long thou. This repair takes extensive time and the right amount of reflow. Let us know how long it lasts. Don't put this board in the oven! It doesn't fair well.Did I leave the soldering iron on?Comment
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Re: LG 55lv5500 bad picture no sound
I had jumped the gun a little bit with my first reply that it was fixed. After I put it back together I had the same issue. So, I took it apart again and did some more heat and it has been running for a couple days now with no problems.Comment
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Re: LG 55lv5500 bad picture no sound
Sometimes you get lucky. I have the 47 inch version of this TV same problem been working great for a year-and-a-half after the reflowDid I leave the soldering iron on?Comment
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Re: LG 55lv5500 bad picture no sound
Take the 4 push in spring loaded pins out of the big black heatsink. Then peel off the rubber pad if yours has one. Heat the chip with a heat gun on low for about 45 seconds. Watch a youtube video on reflow of bga chip to be sure of the time and temp to do it.Comment
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I was just given a Samsung TV with the issue. I read various threads and videos and attempted the ribbon tape method to gain an image, but no luck.
Symptom:
No picture no sound.
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