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What LEDs to buy for Backlight?

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Southerner1959:
I will soon be dismantling the screen on my LG 47 inch TV to replace the faulty LEDs . . .

Can somebody give me an idea of what I should be looking to buy? (I want to order some, BEFORE I start dismantling the screen)

I can see in the Video the are rectangular surface-mount types . . .

Firstly, what size are they?  I'm guessing about 3mm square, or maybe bigger ? (I see that many are just 1mm square, but about 3mm long altogether, due to the solder connections either side)

Are the tops flat, or do they have a dome?

I see all the cheap ones on ebay are just normal LED spec, ie about 3V and 20mA max current . . . are the ones used in the TV much higher current? (I can see that RS Components sell some rated up to 400 mA . . . however most of them listed don't mention the current rating in the spec)

And what about the colour?  I see you can get various different types of white, like Cool White, Bright White, etc etc.

Hope somebody can advise !

Southerner1959:
I'm guessing these might be about right . . . they are 6mm square (is that the right size?) and rated at 350mA:

http://uk.farnell.com/vishay-semiconductor/vlmw712t2t3qn-gs08/led-smd-warm-white-1-4w-87-4lm/dp/2082791

But they do them in Neutral White, Cool White, Warm White etc !

Turnip:

Another thought is a local council tip looking for led screen smashes, maybe even Ebay, as might be the cheapest way of getting a whole heap of 'em.

Guess excess heat is the main problem even though strips are sort'a stuck to the backplate - Chris.

zomikula:
Plus people will not know to set it up on low to medium brightness

the vivid mode etc.. do not help

Turnip:
Well said Zom,

Seems unreasonable that folks have to try sort LED issues with no information.

CCFL's didn't mind the heat but LEDs hate it.

Trouble is that current LED back panels are near thin as foil and with no fan in sight - Chris.

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