Post The Led Backlights Your Fixing Here.

Collapse
X
 
  • Time
  • Show
Clear All
new posts

  • hellride
    replied
    Re: Post The Led Backlights Your Fixing Here.

    Working on fixing a Vizio e420i-a0. Found several bad LED's and have already replaced them. These LED strip's are attached with what looks like double sided tape, which was destroyed when removing the light strip's. My question is, how hot do these LED light strips get after they've been on for a few hour's? I have some Aluminum ducting tape that I thought I could use, though i'm not sure if the heat from the LED's would melt the adhesive on the tape. From what I've found, the Aluminum ducting tape has a max temp of 250°F.

    Leave a comment:


  • n2jtx
    replied
    Re: Post The Led Backlights Your Fixing Here.

    I have a 46" Samsung UN46EH5300 that I found being thrown out two weeks ago while bike riding. The assembly date on the inside label says October 29, 2013 making it 3 1/2 years old. Opened it up and confirmed it is a bad LED string. As it is my first LED TV, I am trying to figure out how to get the back panel off in order to access the LED's. I have the service manual but it does not cover that level of tear down. Overall it is a very nice TV with no scratches. If I do manage to open it, I was planning to fashion an LED tester from a 18650 lithium battery and series resistor. I see used strips are available and figured I would install a used strip and then look to fixing the bad strip to keep as a spare.

    Leave a comment:


  • llonen
    replied
    Re: Post The Led Backlights Your Fixing Here.

    I get around 5 or 6 at the moment coming through the workshop a week, over the last couple of months mostly LG.

    Leave a comment:


  • handsworth
    replied
    Re: Post The Led Backlights Your Fixing Here.

    I love LG, especially the LN series. I've done about 25-30 now. Takes about 45 minutes. Looks like the LF and LB series will running into that problem too shortly. I've already sold replacement strips for these "new" Tv's

    Leave a comment:


  • ReeceyBurger123
    replied
    Re: Post The Led Backlights Your Fixing Here.

    Good work

    Leave a comment:


  • sleeper123
    replied
    Re: Post The Led Backlights Your Fixing Here.

    Wouldn't let me attach both pictures.
    Attached Files

    Leave a comment:


  • sleeper123
    replied
    Re: Post The Led Backlights Your Fixing Here.

    Just got done replacing 2 LEDs in a vizio e470i-a0. My first tv repair.
    Attached Files

    Leave a comment:


  • comptek
    replied
    Re: Post The Led Backlights Your Fixing Here.

    Originally posted by budm
    They make DUAL-LED in one package in many form factors with LEDs in series (6Vf rating due to two white LEDs is series), they also make DUAL-LED connected in parallel, Vf 3V.
    See example PDF.
    thanks Budm very interesting

    Leave a comment:


  • comptek
    replied
    Re: Post The Led Backlights Your Fixing Here.

    Originally posted by vinceroger69
    Thanks for the youtube link.
    youre welcome i have watched all of his vids the one about a jewel thief is good simple to make too

    Leave a comment:


  • vinceroger69
    replied
    Re: Post The Led Backlights Your Fixing Here.

    Originally posted by budm
    They make DUAL-LED in one package in many form factors with LEDs in series (6Vf rating due to two white LEDs is series), they also make DUAL-LED connected in parallel, Vf 3V.
    See example PDF.
    Thanks budm.

    Leave a comment:


  • budm
    replied
    Re: Post The Led Backlights Your Fixing Here.

    They make DUAL-LED in one package in many form factors with LEDs in series (6Vf rating due to two white LEDs is series), they also make DUAL-LED connected in parallel, Vf 3V.
    See example PDF.
    Attached Files

    Leave a comment:


  • vinceroger69
    replied
    Re: Post The Led Backlights Your Fixing Here.

    Originally posted by comptek
    Vinceroger69
    when you look at the mains or high power COB LED (chip on board) there are loads of them if youre into stuff like that lookup BIGCLIVE on youtube he does alot of teardown stuff >>>>
    https://www.youtube.com/watch?v=mZZbj-DNk7M
    Thanks for the youtube link.

    Leave a comment:


  • comptek
    replied
    Re: Post The Led Backlights Your Fixing Here.

    Originally posted by vinceroger69
    Thanks that makes sence too me now
    Vinceroger69
    when you look at the mains or high power COB LED (chip on board) there are loads of them if youre into stuff like that lookup BIGCLIVE on youtube he does alot of teardown stuff >>>>
    https://www.youtube.com/watch?v=mZZbj-DNk7M

    Leave a comment:


  • vinceroger69
    replied
    Re: Post The Led Backlights Your Fixing Here.

    Originally posted by comptek
    on the 2 leds i checked that half work one lights up on left side and the other led lights up on the right side and you can see its half of the led, yes as it seems there is 2 led chips in each led assuming this is how they get the 6v in one package ?
    Thanks that makes sence too me now

    Leave a comment:


  • flocko
    replied
    Re: Post The Led Backlights Your Fixing Here.

    A lot of edge lite strips also have the two LEDs in one case,and also run at 5.5-6.00v but have an oblong case. and can be hard check as you need to just have a large enough voltage to turn them on without it blinding you

    Leave a comment:


  • comptek
    replied
    Re: Post The Led Backlights Your Fixing Here.

    Originally posted by vinceroger69
    dual chip? never heard of that in the diagram there two diodes in each of the leds that you have ordered so is there two leds in one sorry for questions as never heard of dual chip leds.
    on the 2 leds i checked that half work one lights up on left side and the other led lights up on the right side and you can see its half of the led, yes as it seems there is 2 led chips in each led assuming this is how they get the 6v in one package ?

    Leave a comment:


  • vinceroger69
    replied
    Re: Post The Led Backlights Your Fixing Here.

    dual chip? never heard of that in the diagram there two diodes in each of the leds that you have ordered so is there two leds in one sorry for questions as never heard of dual chip leds.

    Leave a comment:


  • comptek
    replied
    Re: Post The Led Backlights Your Fixing Here.

    Originally posted by vinceroger69
    At that price they are cheaper than led strips but harder too change i guess, but hey its worth just trying a couple and powering the set up and see what the colour/brightness match is like.
    hi Vince i have ordered 50 theres only 2 out of the 18 leds that actualy half work theyre dual chip led's so i dont think matching will help much im aiming to replace all

    Leave a comment:


  • vinceroger69
    replied
    Re: Post The Led Backlights Your Fixing Here.

    At that price they are cheaper than led strips but harder too change i guess, but hey its worth just trying a couple and powering the set up and see what the colour/brightness match is like.

    Leave a comment:


  • comptek
    replied
    Re: Post The Led Backlights Your Fixing Here.

    Originally posted by vinceroger69
    have you measured the led size on your strip? aliexpress have so many too choose from.
    yes it looks like 3mm x 3mm

    Leave a comment:

Related Topics

Collapse

  • Pipolups
    Corsair K70 LUX RGB dying LEDs
    by Pipolups
    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
  • TrisHCl
    LED TV Boot loop - UE40F6500SB
    by TrisHCl
    Hi,

    First post...

    I have this TV, which was working, then suddenly would not turn on. It would get the clicking relay then flash up the screen for less than a second, off for a second then on again. Removing the plug the relay continues to click on and off for a few cycles, which I don't think it did before.

    Left it a few months, then finally got round to taking the back off, and it worked as it should. So I tested various bits and all was well. Then turned it on again, and back to the clicking relay.

    I disconnected the main board from the power...
    02-06-2025, 08:42 AM
  • max789
    Samsung UE48H6410 replaced Mainboard but backlights doesnt go on
    by max789
    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...
    01-18-2024, 06:56 AM
  • bpcannan
    VIZIO M557-G0: Backlights or ???
    by bpcannan
    '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...
    10-29-2023, 06:36 AM
  • jesterace
    Samsung UE49MU6400 acts dead until disconnecting backlights, then works.
    by jesterace
    Hi everyone I have this TV which was dead one day when I tried to turn it on. I've had the cover off and there was just a pulsating/electrical clicking/ticking noise from the PSU. I disconnected the mainboard as sometimes this works to just fire it up with backlights on? That didn't help. Same noise. Then I disconnected the backlight cable from the PSU and the TV came alive. It appeared to respond to the remote and i'm pretty sure it's fully operational when there is no backlight connected.

    However, I am in a dilemma.

    I tested the backlight outputs with the lights disconnected...
    10-20-2024, 10:15 AM
  • Loading...
  • No more items.
Working...