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TV LG 32LF5610 Dim Screen Issue - Power Supply Replacement? (Photos Included)

michcio19 34329 20
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Why is my LG 32LF5610 screen dim, and what part should I replace?

The dim picture is most likely caused by a failing LED backlight, not the power supply. Backlight failures are common in this model, and LG service replaces the whole backlight set; individual damaged LEDs can be replaced, but the forum advice is to replace the entire strip set instead of only one LED or one strip [#17521703][#17522383] If possible, use original LG strips, because the Chinese replacements can differ in lens spacing and may light unevenly or show the LEDs through a light image [#17522383][#17528036] After replacement, if the picture seems too bright, lower the backlight setting a bit [#17536611]
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  • #1 17521457
    michcio19
    Level 10  
    Posts: 26
    Rate: 7
    Hello,

    As in the photos, the TV does not brightly illuminate the image, what could be the reason and what to replace, the power supply?

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  • #2 17521564
    GanCegall
    Level 38  
    Posts: 4281
    Help: 339
    Rate: 1626
    michcio19 wrote:
    As in the photos, the TV does not brightly illuminate the image, which may be the reason

    No electricity, for example, maybe not turned on, it broke and a million others ...
    Post photos on the forum.

    Added after 3 [minutes]:

    michcio19 wrote:
    and what to replace, power supply?

    You can replace, and if it changes something, it's a different story ...
  • #3 17521703
    lukasz503k2
    Level 12  
    Posts: 25
    Help: 6
    Rate: 14
    Backlighting often falls on these models. Often it is manifested by a complete lack of image (highlighting), but sometimes the effect is like yours. LG service replaces the backlight set, you can replace individual damaged LEDs.
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  • #4 17521713
    Atu3
    Level 17  
    Posts: 204
    Help: 27
    Rate: 96
    No backlight, possibly a diode to be replaced.
  • #5 17521731
    GanCegall
    Level 38  
    Posts: 4281
    Help: 339
    Rate: 1626
    lukasz503k2 wrote:
    Backlighting often falls on these models. This is often manifested by the complete lack of a picture

    Can you give an example? In which LG model, the damaged backlight causes a complete lack of a picture? Thank you in advance.
  • #6 17521742
    Atu3
    Level 17  
    Posts: 204
    Help: 27
    Rate: 96
    I would like to remind you that the author wrote; tv does not light the picture brightly.
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  • #9 17522383
    Marek09
    Level 24  
    Posts: 1018
    Help: 60
    Rate: 137
    100% backlight for replacement.
    How long do these Chinese slats last, anyone has it longer?
    As they are available, I recommend the originals: https://north.pl/karta/agf78399801-listwa-led-do-telewizora,708-XY-0525.html
    A bit more expensive, but original from LG and you also have factory-made foil under the slats, which is 100% as it comes from the factory, i.e. about 3 years of peace should be. I have recently put on Chinese on metal strips in 2 pieces, because the original ones are not available and are still working, but two months ago it was and it was difficult to say anything more today.
    In any case, always replace the entire set of strips with a new one, never replace single LEDs or individual strips (talking about LG), because in a few weeks / months you will have to come back to the topic.
    Sometimes do not be tempted by used with Allegro. There are new originals available for this model and it is best to insert one.
    How do you feel sorry for money, because you think they are expensive, buy a new TV. That's my advice.
    Regards.
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  • #10 17522666
    michcio19
    Level 10  
    Posts: 26
    Rate: 7
    TV LG 32LF5610 Dim Screen Issue - Power Supply Replacement? (Photos Included)

    I do not gray Ledy, thank you for the help of Tv for 3 years he Stary LG played for me for 20 years :D

    What does the LED case look like in Samusung, Sony or maybe Qled lasted longer, Is it all a matter of 3-4 years?
  • #11 17524156
    Marek09
    Level 24  
    Posts: 1018
    Help: 60
    Rate: 137
    In Samsung, diodes are rarely replaced and there, if you can / need to replace individual strips or diodes, it takes longer. I have not seen the sets, as before, only single strips are available for purchase, but the price of one strip sometimes costs as much as the LG set. Sony has not yet had damaged LEDs, because few people buy them. For that, there are 2 twin, 2-year-old Panasonic 55 "and 42". There are Chinese matrices, but the Innotek backlight is like in LG and you have to take it from aliexpress and wait a month, because we are nowhere to be found.

    Also, LG is not bad. The fact - 3 years does not seem like a lot - compared to earlier technology based on CCFL lamps, where some still shine today without any repair. But they are cheap to repair and parts are available. I have a Sony 42 "myself, I think it's from 2007 or 2008, still without MPEG4, Heavy and wide frame, but to this day it plays without any failure and I'm not going to replace it with some funny smart or 4K.
    The next thing is luck, I guess. When it happens, it sometimes comes not 3 but 5 years.
    QLED - I don't know.
  • #13 17528036
    Marek09
    Level 24  
    Posts: 1018
    Help: 60
    Rate: 137
    They differ in the spacing of the lenses from each other.
  • #15 17535050
    michcio19
    Level 10  
    Posts: 26
    Rate: 7
    I replaced the LEDs, but I have the effect of visible LEDs on a light background: / probably badly matched LEDs?
    the matrix is
    Attachments:
    • TV LG 32LF5610 Dim Screen Issue - Power Supply Replacement? (Photos Included) matryca.jpg (221.4 KB) You must be logged in to download this attachment.
  • #16 17535351
    Marek09
    Level 24  
    Posts: 1018
    Help: 60
    Rate: 137
    Show how it looks in the photo.
  • #17 17535408
    michcio19
    Level 10  
    Posts: 26
    Rate: 7
    TV LG 32LF5610 Dim Screen Issue - Power Supply Replacement? (Photos Included)
  • #18 17535888
    Marek09
    Level 24  
    Posts: 1018
    Help: 60
    Rate: 137
    As for this ... etc ... (I did not select all the diodes - because you know)
    TV LG 32LF5610 Dim Screen Issue - Power Supply Replacement? (Photos Included)

    Well, that's the charm of Chinese strips. They seem to glow stronger than the original ones, which I have observed myself. Maybe they have other diodes? Other lenses?
    And I did not write to take the original? :D It was only PLN 70 difference and it would not be a problem. I avoid them and put them on only as the original is not available.
    And the fact that they are on a metal strip and that they dissipate heat better does not appeal to me. Some Vestels also have metal slats and they also burn out.
  • #19 17535897
    GanCegall
    Level 38  
    Posts: 4281
    Help: 339
    Rate: 1626
    It looks like there is no matrix in this photo :-) , provide a photo with some content.
    Preferably "input" twice.
  • #20 17536166
    michcio19
    Level 10  
    Posts: 26
    Rate: 7
    TV LG 32LF5610 Dim Screen Issue - Power Supply Replacement? (Photos Included)

    Added after 4 [minutes]:

    In a year it will flood and a pile of originals :D for Christmas "home alone" :D
  • #21 17536611
    Marek09
    Level 24  
    Posts: 1018
    Help: 60
    Rate: 137
    You will get used to it over time, and it will not be so visible during the day.
    And you do not have the impression that the image is brighter with these Chinese LEDs and you need to go down with the backlight (not brightness) slightly?
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Topic summary

✨ The discussion revolves around a dim screen issue with the LG 32LF5610 TV, where users suggest that the problem may stem from a faulty LED backlight rather than the power supply. Several participants note that backlighting failures are common in LG models, often requiring complete replacement of the backlight set or individual damaged LEDs. Recommendations include sourcing original LED strips for better longevity and performance, as opposed to cheaper alternatives. Users share links to replacement parts and discuss the differences in LED quality, emphasizing the importance of using original components to avoid recurring issues. The conversation also touches on the durability of LEDs in other brands like Samsung and Sony, with comparisons made regarding their longevity and repairability.
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FAQ

TL;DR: LG 32LF5610 dim screen is nearly always a failed LED backlight; originals often last ~3 years, and "100% backlight for replacement." Replace the full strip set, not the PSU, then lower Backlight if aftermarket strips look too bright. [Elektroda, Marek09, post #17522383]

Why it matters: This helps LG 32LF5610 owners, DIYers, and techs choose the right fix, parts, and settings to restore brightness and uniformity.

Quick Facts

What causes a dim picture on an LG 32LF5610?

Failed LED backlight strips cause this symptom. On this chassis, backlights often fail. You may see a faint, uneven image, or no visible picture while audio plays. LG service fixes it by replacing the full backlight set. DIY repair replaces the LED strip set as well. [Elektroda, lukasz503k2, post #17521703]

Should I replace the power supply or the LED backlight?

Replace the LED backlight, not the power supply. The dim screen points to backlight failure, not PSU regulation. As one expert put it, "100% backlight for replacement." Replace the entire set for a reliable fix. [Elektroda, Marek09, post #17522383]

Is it okay to replace single LEDs or one strip only?

Do not do piecemeal swaps. Replace the entire set of strips in one go. Mixed-age strips fail again quickly. "Always replace the entire set of strips." Avoid used parts when new originals are available. [Elektroda, Marek09, post #17522383]

Which LED strip part numbers fit, and what’s different between AGF78399801 and AGF78400101?

Both are 32-inch LG Innotek variants used with this panel family. They differ in lens spacing between emitters. Match the spacing to your original strips and diffuser layout. Using the wrong spacing can worsen uniformity. [Elektroda, Marek09, post #17528036]

Why do I see bright “LED dots” after my replacement?

Aftermarket strips can emit more light and use different lenses. On bright content, point sources become visible as spots. That artifact is common with some Chinese metal strips. Originals better match the diffuser optics. [Elektroda, Marek09, post #17535888]

How can I minimize hotspots after installing new strips?

Lower the Backlight setting in the TV menu, not Brightness. Reducing backlight current improves uniformity and comfort. Users report a brighter image after some replacements. Dial it down a few steps to balance the panel. [Elektroda, Marek09, post #17536611]

How long does an original backlight set typically last?

Expect roughly three years of normal use before aging shows. This matches user experience with new original LG strips. The originals come with factory-style foils and optics. They deliver a stable, uniform picture for that period. [Elektroda, Marek09, post #17522383]

Are aftermarket/Chinese strips worth it versus originals?

They work and are sometimes the only option. However, they can be brighter and show hotspots. One repairer noted only a ~PLN 70 difference compared with originals. They prefer originals when available. [Elektroda, Marek09, post #17535888]

Is buying used LED strips from marketplaces a good idea?

Avoid used strips. Fatigued LEDs age unevenly and fail again. New originals are available for this size. Installing used parts risks repeating the repair soon. [Elektroda, Marek09, post #17522383]

Do Samsung, Sony, or Panasonic TVs have similar backlight failures?

Patterns vary. Samsung strips need diode work less often, and Sony rarely shows LED failures in the field. Panasonic models using Innotek backlights behave like LG and need similar repairs. Availability can require sourcing abroad. [Elektroda, Marek09, post #17524156]

How do I replace the backlight strips on a 32LF5610?

  1. Source the correct complete strip set that matches your originals.
  2. Disassemble the panel carefully and replace the entire set, not single strips.
  3. Reassemble and test for even illumination across the screen. [Elektroda, Marek09, post #17522383]

What if my TV has sound but no picture?

A completely failed backlight can blank the image while audio plays. That failure mode is documented for this LG series. Restore the picture by replacing the backlight strips. [Elektroda, lukasz503k2, post #17521703]

After replacement, should I adjust Backlight or Brightness?

Adjust Backlight. Leave Brightness for black level; it will not fix hotspots. Reducing Backlight tames glare and improves uniformity. Make this change after any strip replacement. [Elektroda, Marek09, post #17536611]

Can lifespan be longer than three years?

Yes. Failures vary by batch and use. Some sets reach around five years before issues appear. Older CCFL-based TVs often ran longer, but parts differ. [Elektroda, Marek09, post #17524156]
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