40" LED TV display issue


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40" LED TV display issue

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Ironmaniac
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Sep 15, 2017, 3:31 AM

Post #1 of 6 (1142 views)
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40" LED TV display issue	Can't Post

Hello,

I own an AOC 40" LED TV.
Model: LE40A6340/61, Power rating:100-240V ~50/60Hz 75W.

The issue is that the upper half of the display has gone dark. Its unusable. I wish to repair it myself. Please guide me.
I am embedding a photo of the screen below.

Thanks.

jts1957
Veteran

Sep 15, 2017, 6:56 PM

Post #2 of 6 (1123 views)
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Re: [Ironmaniac] 40" LED TV display issue [In reply to]	Can't Post

You need to visually examine the LEDs inside the fragile panel to see if they are truly out.
1) to see if is edge lit type or strips of LEDs;
2) to see if, if strips, are all the same and a strip that is not lighting can temporarily be exchanged with a strip that is lighting for example. Of course, that may put power supply at risk.

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Location: Far, Far Away

Ironmaniac
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Oct 1, 2017, 5:45 AM

Post #3 of 6 (1071 views)
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Re: [jts1957] 40" LED TV display issue [In reply to]	Can't Post

Thanks, JTS.

What skills do I need?

jts1957
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Oct 1, 2017, 7:50 AM

Post #4 of 6 (1068 views)
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Re: [Ironmaniac] 40" LED TV display issue [In reply to]	Can't Post

Start with one of these (or better) as there are many screws:

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Ironmaniac
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Oct 4, 2017, 5:11 PM

Post #5 of 6 (1049 views)
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Re: [Ironmaniac] 40" LED TV display issue [In reply to]	Can't Post

Thanks JTS.
I can unscrew the whole unit apart and screw it back together. The product is out of warranty.
I have basic soldering skills. In fact, I have worked on PCBs as a rookie electronics enthusiast. But, manning an LED repair on my own is a different ball game here in India. Finding a reliable and affordable workshop is very difficult.
Please help, if you could.

Roy

jts1957
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Oct 5, 2017, 12:12 AM

Post #6 of 6 (1043 views)
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Re: [Ironmaniac] 40" LED TV display issue [In reply to]	Can't Post

Bear in mind that the TFT panel has to be handled / unplugged / stored CAREFULLY. You break any of the bonded tab connections or the glass itself and it's all over.
Large, flat, dust and static free work and storage areas will help. Make sure you keep everything in the correct orientation during all stages.
On many units, the back lights will operate with the TFT disconnected.

You must prove that ALL LEDs are working. A darkened area helps.

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Location: Far, Far Away

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