Forum > LCD TV forum

Lg 43uh620v blue leds

<< < (2/2)

sinclairtv:
These blue LEDs were tiny so no chance to replace them. I usually break them with cutters, then melt some solder on them till they can be scraped off, then keeping the lens in alignment, replace the LEDs. I only hardwired these as an experiment when I had 3 hrs to spare lol

Turnip:
Hi Folks,

Just got a Sammy UE32J5100AK where the Leds are Blue RHS but nearly normal LHS with a gradual colour shift between.
Guess at some point replace Leds individually, but in the mean time, strips from an Ebay screen smash.

Wonder why a Led changes colour ? - Chris.

Later - Took the screen off finding 8 S/C Leds and the Blue ones had shed the usual Yellow coating as perhaps got a little hot.

sinclairtv:
This is going to get more common as iv now got same blue leds in a jvc. Put 17dlb40vxr1 in ebay and there's a regular seller selling replacement and different leds for these strips. Dunno if it's worth the hassle as you'd probably be better replacing them all.

Turnip:
Hi Sinclair,

Guess you're right, have a Sammy UE40J5100AK where those little Leds keep popping off even before they turn Blue. Changed a couple, and set back in a month with more gone. Thought to reassemble, then found four more flickering using the tester.

Note Ebay does 100 x A137CECEBP18A for a Tenner, and they look like the originals, so you could sort a couple of pretty big screens or several smaller ones with a hot iron in each hand.

Trying suss something, where with small spots of solder paste, can sort soldering, heating the back of the strip. First try, used too much paste and the Led popped off somewhere, never to be seen again. Now sorted a bit of aluminium channel, a metal clad 3R3 50 watt power resistor and a 250C cut-out - Might work with a 12v 4a supply, or not.

Navigation

[0] Message Index

[*] Previous page