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Turnip:
 Hi folks,

Sound but no back light - Guess Screen Leds, but noted 15 conductors from P/I to screen.

Seems a bit excessive, but note screen Leds are an issue, as plenty on Ebay and look like LG 3v Leds used with Vestel screens.

Guess when taken apart will suss those 15 conductors, hopefully - Chris.

downunder:
Hi Chris,

I note that Samsung and LG are using these multi-pin connectors for the LED drive, especially in larger screens.

Essentially most of the wires are paired for each parcel of LEDs, eg. 1+, 1-, 2+, 2-, and so forth.

With your trusty LED tester, using the legend near the plug, you should be able to check if each pair produces light, and each pair uses

the same voltage as per readout on the tester. On the other hand, you could take the panel apart. All in a day's work.              Bruce

Turnip:
Thanks Bruce,

Took screen apart finding five strings of nine leds. Found nine leds S/C. Thought try use a standard 3v of same dimensions to discover the print doesn't match the led unless soldered in the wrong way around, where of course it doesn't function.

If soldered in the right way the led shorts out the pads. Noticed some on Ebay for 42 inch Sammys, and they look the business.

China does quite a lot but with no close up pictures, and from a distance they all look the same. Early days I guess - Chris.

sinclairtv:
If Chris was wanting to be nice he couldve nipped up to China and took better pics of them.

Turnip:
So true, but Bruce is nearer by a few yards - Chris.

In the event got the ten Sammy Leds in the post today and used most of 'em without over cooking even one. They're sort of nice as a top central spot indicates positive (two at the bottom for negative) so you don't have to keep checking the underside while they flip about as you try get 'em sorted on the strip.

Downside - Strip seems to be glass fibre, and doesn't conduct heat so well - Which might explain premature failure, especially as the strips aren't stuck to the metal back plate - Just slotted in.

Did the usual where you snip from the top and clean up with solder wick, add a little LMP then place the Led and hold over heat 'till the solder melts, then quickly cool the strip with anything handy - Spit on a finger seems to function, as always available - Chris.

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