LG 49UJ6500 Blue Blacklights

[neilc6]

Check this out. LEDs have turned blue. TV is only 2 years old. Owner doesn't know history since they bought it used so could have been store demo. Ordered the wrong strips since there is a panel version that uses 3 rows of strips. Only two rows on this one for a 49 inch TV.

[FrozenHaxor]

Re: LG 49UJ6500 Blue Blacklights

What the? Is this some bizzare LED aging? I have seen LEDs that turn greenish after overheating but this is extreme. Maybe it has some special diffusion filters that change the light wavelength?

[nomoresonys]

Re: LG 49UJ6500 Blue Blacklights

Probably overdriven, definitely worn out and turned blue. The yellow phosphor wears off and blue is left.

[imran333]

Re: LG 49UJ6500 Blue Blacklights

Lg or other vestel brand leds have a problem where some or all leds turn blue and it's just bad leds they use, I had the same problem in hitatchi and LG tv where some are blue but the picture was fine and I only noticed as I was stripping tv for parts but I can't sell the backlights as they are faulty , pictures attached

[captainKKK]

Re: LG 49UJ6500 Blue Blacklights

Over voltage causes LEDs to change colors and is permanent.

[neilc6]

Re: LG 49UJ6500 Blue Blacklights

Got a second LG in with blue backlights 43UJ6300. Popped off the lens this time and it appears there is a yellow filter (see this yellow in all previous LED backlights) that has crumbled away exposing the naturally blue LED underneath.

[nomoresonys]

Re: LG 49UJ6500 Blue Blacklights

got a second lg in with blue backlights 43uj6300. Popped off the lens this time and it appears there is a yellow filter (see this yellow in all previous led backlights) that has crumbled away exposing the naturally blue led underneath.

bingo!!!

[budm]

Re: LG 49UJ6500 Blue Blacklights

They are driven so hard so they fail and LG knows it.
LED failure mode: