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[Solved] Samsung UE40F6400AK: Dark Horizontal Band on Matrix - Matrix or Electronics Fault?

dogi100 31272 8
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
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  • #1 16026639
    dogi100
    Level 8  
    Hello. A few days ago, a dark horizontal band appeared on the matrix. On the following day, the belt was gone and didn't reappear until the evening. The TV is 5 months out of warranty, so service is out of the question. Is it the matrix that is already starting to break or is it the fault of the electronics?
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  • #3 16027081
    GanCegall
    Level 38  
    I would rather bet on the backlight, one or more strips are not lit, as in the picture below:

    Samsung UE40F6400AK: Dark Horizontal Band on Matrix - Matrix or Electronics Fault?


    Yes, you definitely have a damaged LED strip D2GE-400SCA-R3, you need to disassemble the matrix and check it.

    Samsung UE40F6400AK: Dark Horizontal Band on Matrix - Matrix or Electronics Fault?
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  • #4 16039938
    dogi100
    Level 8  
    In the place where the belt is, I feel a chill when I put my hand on it. I feel warm in other places. Probably one of the slats has fallen. Tomorrow I will undress the tv and check it. What could I check a damaged led strip with?
  • #5 16042060
    dogi100
    Level 8  
    I took apart the TV and matrix. In fact, the middle bar is damaged. I have ordered and will be assembled. Many thanks and best regards.
  • Helpful post
    #6 17249359
    Angelo25
    Level 8  
    I have the same problem. Samsung UE55JU6850U. I called the service and there are no slats available. They can try to import exhibition items from Germany. They advise to replace all the cost about 1200 for the strips themselves. If not, then the entire matrix is 90% of the value of tv.

    It's some tv nightmare 5 months after the warranty. Can you help?
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  • #7 17249412
    398216 Usunięty
    Level 43  
    Angelo25 wrote:
    It's some tv nightmare 5 months after the warranty. Can you help?
    No nightmare, but the ordinary law of trade - the product (whatever it is) should break down the day after the warranty period expires. The customer reports to the website and receives the answer that:
    a / Cannot be repaired because parts are missing.
    b / The cost of repair will be at least 2/3 of the price of new equipment.
    In the case of option "a" - there is no other option than to dispose of the old and purchase new equipment. In option "b", the customer quickly calculates and chooses the same solution - at least he has a guarantee ...
    It is so that the company earns money by SELLING its products. No wonder it will do everything to sell as much as possible - and Samsung has been at the forefront for years in this practice.
  • #8 17250494
    dogi100
    Level 8  
    It remains to buy strips from damaged TVs and replace them yourself. It cost me about PLN 20 for one strip. Taking the TV apart is not easy. You have to be careful with the matrix which is very delicate. You can sweat at the same time. Soon I will have to dismantle this TV again because on the white board under the matrix there is dust, and in very bright scenes on a white background it is quite visible. So be sure to purchase a textile tape, take it apart and clean the white plexiglass screen thoroughly.
  • #9 18419587
    dogi100
    Level 8  
    Replacing the led backlight solved the problem
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Topic summary

A user reported a dark horizontal band appearing on their Samsung UE40F6400AK TV, which temporarily disappeared and reappeared later. The TV is out of warranty, raising concerns about whether the issue is due to a failing matrix or an electronic fault. Responses indicated that the problem likely stems from a damaged LED backlight strip, specifically the D2GE-400SCA-R3 model. The user confirmed the damage after disassembling the TV and planned to replace the faulty strip. Other users shared similar experiences with different Samsung models, highlighting the commonality of this issue shortly after warranty expiration and the challenges in obtaining replacement parts. Suggestions included sourcing strips from damaged TVs and performing the repair independently.
Summary generated by the language model.
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