LED Backlight replacement question

[CraigR]

I'm starting to see more and more Vizio and LG's coming in with LED back lights burned out and I have not found anyplace to purchase a new strip just a hit or miss with used stuff on eBay. I have butchered a few in from doner backlight strips but I see after removing the lens it might not be too bad a job just to super glue a new LED bulb on top the old one and solder to the old connections then install the lens again. Has any one done this or has any ideas on what to do replacing these other than what I am doing right now??

[ReeceyBurger123]

Re: LED Backlight replacement question

You can get them off replacement/spare strips, if you want I can link my repair video of this. If not just order some pure white SMT 0.5w-1w Leds.

[CraigR]

Re: LED Backlight replacement question

Sounds like what I have been doing but sure I will have a look at your video.

[chrismurphy]

Re: LED Backlight replacement question

dont bother with removing the lens ,you wont get them back on well enough so not to give a hot spot on the screen
Best bet is to replace led strips with strips from donor sets or remove the led faulty led and place a cut section of a good led from faulty strips on top and connect with wires
Plenty of YouTube clips showing this
how to test https://www.youtube.com/watch?v=eEJoPCa7Kt0
stacking https://www.youtube.com/watch?v=RxwdC7V5Ue0

[CraigR]

Re: LED Backlight replacement question

This is what I have been doing all along. Was hoping there was some new way to do it out there.

[SLK001]

Re: LED Backlight replacement question

dont bother with removing the lens ,you wont get them back on well enough so not to give a hot spot on the screen

Don't remove the lenses? What is so hard about it? I use a hair dryer to softer the glue, then just pop them off. This is the time to remove all the remaining glue, while it is still warm. Once the LED is exposed, replace it with a good one. Mix up some 5 minute epoxy and using a toothpick, place a small amount in the holes in the strip, then carefully place the lens into the epoxy. Once cured, no bad colors and no hot spots.

[jbfr_54]

Re: LED Backlight replacement question

I personnally replaced a lot of bad LED's on strips, just removing the lens with a precision cutter applied on the base of three pads, then using a heat gun to remove the failing LED and resolder a new one in place either from its edge with a conventionnal solder iron or with a heat gun blowing from the backside of the strip's PCB. In that cas I use self adhesive aluminium (used by plumbers) to maintain the LED in place and prepare both the LED and the PCB pads with a little solder and flux. Watch the polarity and test one by one the replaced LEDs. I use 3528 LEDs from this source : http://fr.aliexpress.com/item/100PCS...OrigTitle=true. Then refix the lens using a little drop of instant glue on each pad while maintaining the LED low glow by appliying small amount of current in order to correctly center the CAP above the lighted surface of the LED. Light diffusion is not perfect but acceptable and each LED replaced is à 5 cent fixing, a lot less than buying a new stripe. Good luck !