Washed out picture on LG

[JohnCT]

Common problem. There are two solutions: change every LED in the TV or find *new* strips (don't get any used or "pulls").

If you elect to change all the LEDs, you're going to have to expand the lands on the strips by scratching the mask back with a small screwdriver because the original LEDs are so tiny (and not available). Also, you'll need to replace every lens because your replacement LEDs won't fit under the original lens'.

You can use donor strips from a different brand as long as you stay with 3.3 volt LEDs and use the same total number so as not to piss off the IC controller. If you use strips from another brand, you probably will have to punch out holes in the white reflective barrier to match the lens spacing.

John

[dishdude]

Originally Posted by JohnCT

Common problem. There are two solutions: change every LED in the TV or find *new* strips (don't get any used or "pulls").

If you elect to change all the LEDs, you're going to have to expand the lands on the strips by scratching the mask back with a small screwdriver because the original LEDs are so tiny (and not available). Also, you'll need to replace every lens because your replacement LEDs won't fit under the original lens'.

You can use donor strips from a different brand as long as you stay with 3.3 volt LEDs and use the same total number so as not to piss off the IC controller. If you use strips from another brand, you probably will have to punch out holes in the white reflective barrier to match the lens spacing.

John

Thanks for the info. Can you recommend a good source for new strips?

[JohnCT]

Originally Posted by dishdude

Thanks for the info. Can you recommend a good source for new strips?

If you're not in a hurry, then Aliexpress. Otherwise, ShopJimmy may have them as well. Don't forget to check ebay, but make damned sure these are not pulls! Even working strips will have some LEDs just starting to turn blue (slow progression).

Replacing all the LEDs individually is time consuming and there's a bit of a learning curve involved, plus you'd need a big bag of donor lens (I have thousands). Upside to this is that it costs virtually nothing. Downside is that it takes a lot of time and precision alignment of the donor lens.

Put your model number in the ShopJimmy website, and if they have the strips, you can get them there. They will also have high res scans of the strips so you can often use those numbers to check with Aliexpress if you don't mind waiting 3-4 weeks.

If you do replace the strips, be ****very**** careful putting the screen back in the plastic guides. If one corner is just a smidge over the frame, it will crack when you snap on the outer bezel.

If you do get new strips installed successfully, send me the part number of the power board and I'll tell you how to modify the drive current to the strips that will extend the life of them by at least 4X minimum.

John

[YamahaFreak]

Originally Posted by JohnCT

If you're not in a hurry, then Aliexpress. Otherwise, ShopJimmy may have them as well. Don't forget to check ebay, but make damned sure these are not pulls! Even working strips will have some LEDs just starting to turn blue (slow progression).

Replacing all the LEDs individually is time consuming and there's a bit of a learning curve involved, plus you'd need a big bag of donor lens (I have thousands). Upside to this is that it costs virtually nothing. Downside is that it takes a lot of time and precision alignment of the donor lens.

Put your model number in the ShopJimmy website, and if they have the strips, you can get them there. They will also have high res scans of the strips so you can often use those numbers to check with Aliexpress if you don't mind waiting 3-4 weeks.

If you do replace the strips, be ****very**** careful putting the screen back in the plastic guides. If one corner is just a smidge over the frame, it will crack when you snap on the outer bezel.

If you do get new strips installed successfully, send me the part number of the power board and I'll tell you how to modify the drive current to the strips that will extend the life of them by at least 4X minimum.

John

I'd be interested in that lifespan-lengthening mod. Does it work for most/all makes? I'm seeing an increasing number of LED backlight sets with failed LEDs.

[dishdude]

Originally Posted by YamahaFreak

I'd be interested in that lifespan-lengthening mod. Does it work for most/all makes? I'm seeing an increasing number of LED backlight sets with failed LEDs.

Thanks for bumping this thread. I'm picking the set up next week and was planning to ask the same question. I've also been seeing a lot of sets with this failure recently now that I know what to look for.

[YamahaFreak]

Originally Posted by dishdude

Thanks for bumping this thread. I'm picking the set up next week and was planning to ask the same question. I've also been seeing a lot of sets with this failure recently now that I know what to look for.

Not a problem! :P