TV Repair Question

[erikras]

Anyone here have any experience repairing LCD/LED TV's? My girlfriend has a 2 1/2 year old LG 47" 47LV440-UA that is now displaying either a solid blue/purple rectangle or a distorted image in the same location. This TV only really has a power supply PCB, and a main board PCB in addition to the panel.

There's plenty of speculation on the interwebs and I can take my own educated guess. I'm hoping someone here has experience repairing these. If it is the main board, I can get a new one for $130-200. It is DEFINITELY not worth paying someone hundreds of dollars in labor just to diagnose the thing.

Thanks!

 

[Uberryan]

Pull the PSU and check all the resistors and transistors for popped caps. You'll note, all caps should be flat, if they are puffed up, especially at the top, they will need to be pulled and replaced with the correct amperage.

I doubt the screen is bad, because it would happen to the whole screen and not just a segment unless that part was damaged by a falling object or something.

 

[erikras]

I doubt the screen is bad, because it would happen to the whole screen and not just a segment unless that part was damaged by a falling object or something.

I agree that it's probably not the screen. It's mounted over the mantle so there's no way anything even touched it. And every example of a bad screen that I've seen was typically single rows of pixels gone bad. Not huge blocks like this. I plan to tear it apart this coming Saturday and check for the obvious. I'm no TV repair man, but I've fixed plenty of computers, laptops, and I do building automation systems all day at work.

 

[09vdubgti]

FWIW.

My Samsung LCD had issues with powering on. Called a repair guy, diagnostic was only like $20, and $50 to replace and solder some new capacitors. It doesn't really cost hundreds of dollars.

 

[KYGTIGuy]

Wyoming prices...

 

[AlfaMikeF0xtr0t]

I also had a Samsung and I contacted them and found out that they offer a 1 time free fix, I didn't pay extra for an extended warranty or anything. TV was like 5 years old. Had a repair guy out, swapped a part and all was good, for free.

I would at least contact LG to see if they do something similar.

 

[erikras]

Thanks for the replies guys! Turns out her parents have a 46" in their spare bedroom that they aren't using so they're giving it to her. I'll probably still open up the LG 47" in question and poke around to see what I can find.

 

[CaptObvious75]

LG makes me cringe lol


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[erikras]

LG makes me cringe lol


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They're no better or worse than all the other consumer electronics junk (and by junk I mean almost everything made today) out there. I've had a few LG products and this is the first one I've had malfunction.

Thursday evening we pulled the TV off the wall and opened it up to check for anything obvious. The ONLY thing I did while we had it open was remove the ribbon cables that connect the panel to the main board from the ZIF sockets on the main board and reconnect them. Now the TV works perfect. Go figure.

 

[09vdubgti]

Agreed, LG's products are just as good as any higher tiered Electronics brands.