Re: Backlight issue LG 50ln5600
Ahh right ok and how are they connected, as in what type of connectors go to the leds ?
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Re: Backlight issue LG 50ln5600
I'll get a picture up tomorrow. Each led strip is made up of 2 strips. They are in 6 rows top to bottom. No matter what set of LEDs I swap in. Only the same 3 rows light up then shut off. If I swap the lighting 3 with the non lighting 3 the same three rows continue to light . At first I believed 3 rows of LEDs were bad and needed replaced. I swapped those rows with the working LEDs and they would not light. The LEDs open or shorted does not seem to be the issue. The issue is what would make 3 entire middle rows not light up if the LEDs on those rows are all in working order?Last edited by 7thkey; 06-28-2015, 01:10 PM.Leave a comment:
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Re: Backlight issue LG 50ln5600
Leds don't fail open they fail like incandescent light bulbs and just plain don't light due to the whisker inside of them snapping. The leds strips will be wired in series so if one diode fails the rest of the strip wont light. Can you take photos of the inside of the screen and of the strips please.Leave a comment:
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Backlight issue LG 50ln5600
I have an issue with 3 backlight strings not lighting. I turn TV on top 2 strings light, bottom string lights. Middle 3 do not. Then all backlights turn off due to protect . I tried switching out different working stings to result in always the same result. This model has the led drivers built into power supply. I replaced power supply also same result. I do have picture and sound via flashlight test.
From top to bottom led+ 108 to 78, led- 40, led+ 170 then slowly drops,led- 61.
I have not replaced or tried a bypass jump of main board. I have not replaced the led strip connector board (66371-0021A) it shows no sign of distress or problems.
I've seen similar models have bad LEDs and diodes have been used in place. My problem is not open LEDs as mine all work and check out.
Any help would be appreciated thank you.
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Hi There!
I'm trying to help my friend who owns a restaurant be just bought.
He has a very long LED strip running along all the walls and columns. The strip is attached facing down 2in above the floor, using a wall panel that ends in a metal rail that finishes the panel underneath
It's stuck using, I guess, the 2 sided tape that comes with the strip
The issue is that like 1/2 of the full length, including 1/2 one wall, another entire wall, and one column, flickers after 4 or 5 minutes ON. Particularly it flashes staying OFF most of the time and flashing ON for 1 tenth... -
I have a TCL 43S435 with no backlights. I contacted ShopJimmy and they said power supply. I got replacement power supply, but still doesnt work. I have confirmed that there is an image with flashlight test. I have also verified that the led strips work when I probe them with LED tester. Any ideas would be helpful. I am also geting a double blink on the status led when trying to turn it on......Nothing on the power supply looks suspect, and caps look ok. Where should I start to test......Thanks!...
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
Hi everyone,
I'm working on a MacBook Air 2020 (A2337, board 820-02016) and running into a strange USB-C issue. I've gone through quite a bit of testing and part replacement, but I'm stuck — hoping someone here can shed some light.
🛠 Original Issue
The machine initially wouldn't negotiate 20V over USB-C — stuck at 5V.
Diagnosis showed PP1V5_UPC0_LDO_CORE shorted to ground.
I replaced U3100 (UF400) using a donor board (A2179), and the machine powers on fine now.
⚠️ New Problem: One USB-C Port Only Works in One Orientation... -
I am writing this because I came looking for the same information but couldn't find anything. There are certain model tvs that will have 2 or more different backlight strip configurations and there is often no way to tell exactly what you have without disassembling the panel. Twice now I have run into this issue and ended up ordering the wrong sets BOTH times. The previous TV I reordered the correct ones and went on my way. The second one I had no patience for returns or reorders, let alone peeling the brand new strips back out and risk damaging them.
The number of LEDs per pair is...03-12-2024, 08:32 AM
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