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[Solved] Dust Removal Tips for Samsung UE40J5100 LED TV: DIY Cleaning Guide & Precautions

pablo_89 15579 13
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  • #1 17203298
    pablo_89
    Level 9  
    Posts: 45
    Rate: 9
    Hello. I will describe a problem that irritates me. I bought the TV two years ago, it was sporadically used at that time, it still has protective films. When watching, you can see spots of dust on a light background, I read a little about it on the internet. I would like to spin and clean myself. I need a few tips on what to look for when undressing and what to clean, what preparations to use. I have manual skills, but I have never turned up the LED, so I will be grateful for any tips. Thank you in advance for your help.
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  • #2 17203419
    DiZMar
    Level 43  
    Posts: 32217
    Help: 2869
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    pablo_89 wrote:
    ... While watching, you can see spots of dust on a light background, ... I would like to spin and clean myself. ...

    If you can see the dust on the screen, you need to clean the screen with ready-made wet glasses wipes. There is no need to unscrew it. If these spots are inside the matrix, I assure you that you will not remove it.
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  • #3 17203527
    398216 Usunięty
    Level 43  
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    pablo_89 wrote:
    it also has protective foils. When watching, dust spots can be seen on a light background,
    DiZMar wrote:
    you need to clean the screen with ready-made wet glasses wipes. There is no need to unscrew it
    But the picture of the protective film (not the polarizer!) Already.
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  • #4 17203670
    DiZMar
    Level 43  
    Posts: 32217
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    398216 Usunięty wrote:
    ... But the picture of the protective film (not the polarizer!) Already.

    Don't say he is watching through the protective film on the screen because I will not believe it!
  • #5 17203710
    pablo_89
    Level 9  
    Posts: 45
    Rate: 9
    of course, it's a protective film on the frame. The dust is from the inside, why can't I clean it? Rtv websites do such things, I read about this case.
  • #6 17203734
    DiZMar
    Level 43  
    Posts: 32217
    Help: 2869
    Rate: 6508
    pablo_89 wrote:
    ... The dust is from the inside, why can't I clean it? ...

    I did not meet the dust inside the TV was visible on the screen. A lot can still surprise me in my life. If they are stains (but this is probably not dust) from the inside, after you get to these stains and reassemble the stains will be even more visible. But it's your circuses (TV) and your monkeys (spots).
  • #8 17204147
    398216 Usunięty
    Level 43  
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    I still do not know if it is about dust under the film or under the screen - in the first case remove (finally ...) the protective film and clean as above (moist cloths for this purpose can be purchased - NO WATER WITH DETERGENT!). In the second, return to the service.
    As it turns out, unused equipment (or used sporadically) also "consumes" - these days, unfortunately, it's completely normal ... :( .
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  • #9 17206010
    pablo_89
    Level 9  
    Posts: 45
    Rate: 9
    dust under the screen, there are plenty of topics on the internet. I put the link, I have similar marks, only less visible, only on a white background.
    https://www.youtube.com/watch?v=vihABHIu-Sw
    I just wanted to ask for tips on how to get inside, if cleaning alone does not help, it's difficult.
  • #10 17206013
    398216 Usunięty
    Level 43  
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    After all, do you have a "guide" in the link you posted yourself? You want to risk - undress, wipe ... just don't be surprised how you won't see anything after folding (hope not).
  • #11 17206031
    DiZMar
    Level 43  
    Posts: 32217
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    398216 Usunięty wrote:
    ... You want to risk - undress, wipe ... just don't be surprised how you won't see anything after folding (hope not).

    That's what I meant by writing post # 6 04 May 2018 23:17
    DiZMar wrote:
    ... after you get into these spots and reassemble the spots will be even more visible. But it's your circuses (TV) and your monkeys (spots).
  • #12 17206550
    Andrzej4567
    Level 21  
    Posts: 547
    Help: 26
    Rate: 248
    I sometimes saw dust under the matrix (these were long-used TVs, e.g. 10 years). In this case, they like to create semicircles on the sides, running from the bottom corner of the matrix to the top corner of the matrix. When wiping such a matrix, the white cloth became dark. It turns out that there were leaks in these corners and the air was moving inside the matrix, like the air is moving, e.g. in a radiator. For the air to move inside the matrix so intensively, the temperature must be quite high. In the case of leds, I have not encountered this phenomenon. Matrix defect is rather responsible for irregular spots.
  • #14 17372912
    pablo_89
    Level 9  
    Posts: 45
    Rate: 9
    topic solved, cleaned matrix from the inside. Subject to close.
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Topic summary

✨ The discussion revolves around cleaning dust from a Samsung UE40J5100 LED TV, particularly addressing the visibility of dust spots on the screen. Users suggest that if the dust is on the screen, it can be cleaned with wet glasses wipes without disassembling the TV. However, if the dust is inside the matrix, it may require disassembly, which poses risks of making the problem worse. The author expresses a desire to clean the TV themselves, seeking advice on precautions and cleaning methods. Links to external resources and videos are shared for further guidance. Ultimately, the author successfully cleaned the matrix from the inside.
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FAQ

TL;DR: Some internal dust appears in long‑used TVs (e.g., 10 years). "Matrix defect is rather responsible for irregular spots." For screen-only dust, use pre‑moistened wipes; avoid disassembly. Internal dust cleaning is possible but risky, and may worsen spots. [Elektroda, Andrzej4567, post #17206550]

Why it matters: This FAQ helps Samsung UE40J5100 owners decide if visible “dust” needs simple surface cleaning or risky panel disassembly.

Quick Facts

How can I tell if the dust is on the screen or inside the panel?

Remove any shipping film. Clean the screen with pre‑moistened glasses wipes. If spots do not change, dust is inside. Do not use water with detergent. For internal dust, return the set to service. [Elektroda, 398216 Usunięty, post #17204147]

Do I need to unscrew the TV to clean visible dust?

No. If dust is on the screen surface, clean it with ready‑made wet glasses wipes. “There is no need to unscrew it.” If spots are inside the matrix, you will not remove them. [Elektroda, DiZMar, post #17203419]

Are irregular white-background spots usually dust or a panel defect?

Irregular blotches on a white screen usually indicate a panel issue. “Matrix defect is rather responsible for irregular spots.” Semi‑circular trails can appear when dust moves inside through leaks on old sets. [Elektroda, Andrzej4567, post #17206550]

Is dust under the matrix common on Samsung LED TVs?

It is uncommon on LED sets. One tech saw dust under matrices mainly in long‑used TVs, about 10 years old. He had not seen this phenomenon in LED TVs. [Elektroda, Andrzej4567, post #17206550]

What risks should I consider before opening the UE40J5100?

Opening the panel is high risk. You can mis‑stack sheets, add dust, or damage the display. “Don’t be surprised how you won’t see anything after folding.” Proceed only if loss is acceptable. [Elektroda, 398216 Usunięty, post #17206013]

What cleaning materials are safe for the outer screen?

Use ready‑made wet glasses wipes. Wipe gently in straight lines without pressing hard. There is no need to unscrew the TV for surface cleaning. [Elektroda, DiZMar, post #17203419]

Can I use water, soap, or detergent on the TV?

No. Use only moist cloths made for screens. “NO WATER WITH DETERGENT!” Remove the shipping film, then clean the surface as above. [Elektroda, 398216 Usunięty, post #17204147]

Can a rarely used two‑year‑old TV show internal dust spots?

Yes, owners have reported cases. One UE40J5100 owner saw dust‑like spots after about two years of sporadic use. The marks were visible on light backgrounds. [Elektroda, pablo_89, post #17203298]

What patterns suggest airflow leaks moving dust inside the matrix?

Look for semi‑circles along the sides, from a bottom corner to a top corner. A white cloth may darken when wiping exposed layers. These signs point to leakage paths with heat‑driven airflow. [Elektroda, Andrzej4567, post #17206550]

Has anyone successfully cleaned a UE40J5100 panel internally?

Yes. The original poster confirmed the issue was solved after cleaning the matrix from the inside. This thread’s UE40J5100 case ended successfully. [Elektroda, pablo_89, post #17372912]

If I decide to clean inside myself, what’s a minimal 3‑step approach?

Work carefully and at your own risk.
  1. Unplug, discharge static, and work in a clean, dust‑free area.
  2. Remove back cover and bezel; lift LCD and diffuser stack carefully.
  3. Dry‑wipe each sheet with a lint‑free cloth; re‑stack precisely and test before final reassembly. [iFixit, 2021]

Should I send it to service instead of DIY?

If the spots are inside the screen, service is safer. The advisor recommended returning the set in that case. DIY carries significant risk of damage or failure. [Elektroda, 398216 Usunięty, post #17204147]

Could leaving shipping film on affect things, and what must I avoid removing?

If a protective film is present, remove the shipping film. Do not remove the polarizer. As one member clarified: “protective film (not the polarizer!).” Mixing them up can ruin the display. [Elektroda, 398216 Usunięty, post #17203527]

Why might spots look worse after reassembly?

Opening the panel can introduce dust or misalign the diffuser layers. One expert warned the spots may look even more visible after reassembly. Accept this risk before you start. [Elektroda, DiZMar, post #17203734]
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