Picked up this 42LB5800 from the roadside. Its a 2014 model. It rattled when I moved it. Turns out all the lenses had fallen off. Not a big deal to reglue them. The screen looked good!
But 6 LEDs were burned out. So, in my quest to replace them I turned to Ebay and ordered a strip of 10. They were listed as cold white, which is what I needed, but it turns out they glowed yellow. Do they need to burn in?
So, I ordered a second set of LEDs from another supplier, that also listed them as cold white. I couldn't get them to turn at all (either polarity).
So, does anybody know the trick to obtain the proper LEDs for these things?
There are 4 rows of 8 LEDs each so changing them all is not an impossibility. Thanks.

I just pull the strips from broken panels - never tried actually ordering them.

There are two types of lenses used in LED sets. The domed ones use a smaller LED than the cylindrical ones. I've never seen the domed ones fall off.
So I've decided to re-assemble the rattlevision. It had been dissassembled on the LR floor for 2 months.
The results are good even with the yellow LEDs. I'm thinking the yellow is caused by a lower than expected voltage. You really don't notice it unless you know where to look.

I'm thinking the yellow is caused by a lower than expected voltage.

LED color doesn't change with dimming, so those are simply yellower LEDs and always will be.

You know, you are absolutely right. I should have known that.
I'll put up with it like that till I can locate the correct LEDs.
Most likely I'll find another rattlevision on the roadside since this problem seems to be endemic to this series of sets.

good luck on gluing of those lenses. pita

Not a problem. There are 3 little indents on the lenses that align to protrusions on the strip. I used small drops of Ultrablack from the auto parts store.
The only problem is if you have to replace an LED, then your alignment might be "off" a little.
There is a procedure on Youtube using a piece of diffuser to align them correctly. Works pretty well since I had to replace 6 LEDs.