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Re: LG Nano91 TV Backlights
I believe you. Thanks for the help. I will report back with my finding tomorrowComment
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Re: LG Nano91 TV Backlights
Here ziner diodes are installed separately on the bar for each channel (4 leds).Attached FilesComment
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Re: LG Nano91 TV Backlights
lotas innotek build the ziner inside the led unit.Comment
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Re: LG Nano91 TV Backlights
Diah,
Measured the led in beep mode and diode mode and got OL on both. No shorts but no reading either. As for size I cannot measure but I took a pic of it next to a 3030 led for comparison.Attached FilesComment
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Re: LG Nano91 TV Backlights
Here you goAttached FilesComment
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Re: LG Nano91 TV Backlights
from the photo i can see there are 4 LEDs section. 4x6 =24V or coulf be they are just 3 x6= 18V. on the label there are 18UM 2W
you need to see the back side exactly if they are separated ( no conection at bed )to know how many they are, same as Lotas said early they are group of many LEDs
Attached FilesComment
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Re: LG Nano91 TV Backlights
I tried my best to desolder and take a pic of it. It's so small and I don't have a scope so it's hard to work on.
The last pic I believe is the best and I think your right about 4leds.
Now we have some better info on them. Trying to source them is another thingAttached FilesComment
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Re: LG Nano91 TV Backlights
yours last photo they look 8 leds... and you do have 8 channel.. lol
the best way look on the strips where you removed the led..Comment
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Re: LG Nano91 TV Backlights
It's still hard to tell. But here is the strip where it was removed fromAttached FilesComment
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Re: LG Nano91 TV Backlights
need to remove / clean the old solder to see howmany beds.. now they look shorted togetherComment
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Hi there !
I'm having an issue for several weeks with my quite old K70 LUX RGB keyboard. I haven't used it for few months, and once I setup up again my desktop computer, I got several dead LEDs on that keyboard. I tried the Corsair troubleshooting thing (disabling options in iCUE, ...) but nothing changed so I conclude that for some reason some LEDs went in retirement...😅
Decision taken to change these LEDs as I have access to desoldering iron and binocular magnifier, I wrote a ticket to tech support, hopping to obtain the LEDs reference and... They refused to tell me 🙄...10-08-2024, 11:58 AM -
Hello, I have a problem with my Samsung UE48H6410SSXZG with the main board BN41-02156A and the power board BN44-00709A. Everything seemed like this, the TV could no longer be switched on, the standby LED always flashed 5x2 times. Backlight was off and no sound from TV. Also made the flashlight test and there was no picture.
I made the following tests:
1. Disconnected the main board from Power Board = backlight works.
2. Connected the main board and disconnected the T-Con = backlights does not work.
So I ordered a main board from Ebay also BN41-02156A but from... -
'Morning,
I get sound and picture when powering on the TV and its stays that EXCEPT that the left half of the screen will dim every few seconds then return to normal while the right side of the screen performs as designed.
Did the soft and hard reset options pulling the plug, using the reet option in the vizio menu to no avail.
I checked the mainboard - found some popped capacitors so replaced it - but that did not change the situation.
I checked the t-con board. It is getting good power. Then I removed one ribbon cable to see if I could isolate... -
This set has the known reputation of failed led backlights. The set does not turn on, but when plugged in, the power led stays lit for about 5 seconds followed by two short blinks and then it repeats itself. While shinning a flashlight on the screen, you can make out the Sharp logo, then it goes out and repeats the cycle. I measured some voltages across the led backlight connector. What has me puzzled is that when I place the negative lead of my vom on the led backlight pin connector (in which the black wire going to the leds was), I measure as high as -228volts, and then it falls to -95 volts... -
I replaced the backlights on this Hisense TV and the LEDs were showing on certain images. Drove me nuts, so pulled it apart, got new LEDs and put it back together. Now I don't have a picture. TV came apart very easily both times and I was very carful with the panel. I've replaced all the boards for good measure and still have the same issue. Unhooking either side of TCON board still gives me a blank screen with backlights and sound. Is it really possible the panel is junk just from taking it off with suction cups and gently placing it back in place?
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