logo elektroda
logo elektroda
X
logo elektroda
Advanced Search
logo elektroda

Samsung UE40D5500RW TV Continuously Turning On and Off: Identifying & Replacing Motherboard

jachu876 150900 66
Best answers

How do I repair a Samsung UE40D5500RW that boots for a few seconds and then keeps restarting, and does the replacement mainboard have to be an exact match?

If you replace the whole main board, it should be the exact same board number, but this reboot loop on Samsung D-series TVs is usually caused by the NAND flash on the motherboard rather than the power supply [#15229393] [#16440643] The posts describe this symptom as a damaged Flash/NAND issue, often on the chip marked IC1302 and identified as K9GAG08U0E in these models [#16440713] [#18653653] The recommended repair is to replace the NAND with a new, correctly programmed chip or buy a pre-programmed one, and some users reported success after soldering in a pre-programmed flash [#16440713] [#17488875] [#20470114] Freezing the chip can make the TV start again, but it is only a temporary workaround and later failures are common [#17740879] [#20217083] So the best long-term fix is a programmed NAND replacement; if you buy a full board, match the original part exactly [#15229393] [#18653653]
Generated by the language model.
ADVERTISEMENT
Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
Report a violation of the law
Reply | New topic
  • #31 18146061
    kola_kolski
    Level 13  
    Posts: 66
    Rate: 27
    Other or what? Do you have the knowledge? It's a nice TV. I want to save him.
  • ADVERTISEMENT
  • #32 18146073
    Wojtek M
    Level 39  
    Posts: 3690
    Help: 520
    Rate: 1121
    Freezing NAND and thinking that the problem is fixed is the same as using a painkiller on a broken tooth!
  • ADVERTISEMENT
  • #33 18147297
    kola_kolski
    Level 13  
    Posts: 66
    Rate: 27
    Hope it's not for me. I am well aware that this is not for long, if at all. Has anyone had that with the D6000? Whether to post a new topic.
    PS. The power supply looks good, but the devil is in the details. Therefore, I repeat the question.
  • #34 18375444
    Radiohead 49
    Level 12  
    Posts: 13
    Help: 2
    Rate: 1
    Welcome to the New Year,
    I wish you good luck and all the best for this year.
    I had a case like in the topic with UE 37D5500.
    I have just completed my experiment successfully
    with freezing that memory. Many thanks to Kol. Piotrjar.
    Greetings. George.
  • #36 18441796
    kacper69
    Level 16  
    Posts: 255
    Help: 7
    Rate: 60
    Recently, I was doing such a UE46D5000RW.
    It turned on by itself when it wanted to and it turned off by itself, even when it was not connected to anything, only it had a power supply.
    In this case, the problem was solved by:
    10-second freezing of the IC1301 chip (the one with the sticker with the firmware version),
    and then connecting the power to the TV,
    turning it on in the service mode (INFO - MENU - MUTE - POWER)
    and execution of FACTORY RESET.

    After such an operation, the TV works for a few days without any problems.
  • #37 18454660
    Krzymik
    Level 2  
    Posts: 2
    Rate: 2
    Yesterday I saved the UE40E5500 with the "freezing" of the IC1302. It worked, but I have concerns - for how long? You can hear voices saying that a maximum of a month, others say three months. Somewhere there was an entry that even half a year.
    A request to everyone who repaired TV by freezing - how long did your TV sets work or work?
    greetings
  • ADVERTISEMENT
  • #38 18653653
    samochod3
    Level 15  
    Posts: 137
    Help: 3
    Rate: 26
    In EU * D5500, D5700, D5520, D5720, PN51D6500, PS51D6900 PS59D6900 the only sure way is to replace the programmed nand flash K9GAG08U0E
  • #39 18730701
    raffael82
    Level 9  
    Posts: 6
    Rate: 6
    raffael82 wrote:
    dominiss1990 wrote:
    Piotrjar wrote:
    Hello
    I know that the topic is old but still valid.
    I have the UE40d5500 with a slightly cracked matrix but it can be watched.
    Replacing memory or motherboards does not make sense (prices start from PLN 100 up).
    I rummaged and found 2 sites that make the tv work.
    1.According to the video, I reset to factory settings, but the tv kept turning off.
    2. According to the description on the tv page, he came back to life. I used a freezer from the pharmacy because there was one at home.

    I hope tv will work a little longer.
    greetings


    @Piotrjar the second way worked. Just turn on the TV and start freezing (I also used a freezer from the pharmacy), we freeze until the TV goes into normal operation - for me it happened after literally 5 seconds. And so far the TV works again :)


    Hello,
    I had the same problem, I did the second way in the following three steps and after the problem :)
    1. Remove the back cover of the TV to access the motherboard
    2. turn on the TV
    3. on the flash memory marked as IC1302, let go of some "frost" and keep it on until it starts up to normal mode.

    That's all ;)


    Many people ask the question, how long does the "frost" method work, and since today I had the same problem again (and of course I also eliminated it in the same way as before :) ) it turns out that the home repair method worked for almost a year ;)
  • #40 18825055
    jaros21
    Level 11  
    Posts: 10
    Rate: 5
    Hello,
    I have the same problem with the Samsung UE55D8000YSXXH - it turns on and off every 2 seconds.
    I'm trying to replace the motherboard, but I wanted to try the freeze method first.
    I tried freezing the flash with a drugstore freezer with the power off because my freezer leaves quite a lot of frost. After drying the disc, I turned on the TV and it went on for about 10 seconds, then it returned to its previous state. Apparently freezing was too short.
    Tell me, is it safe to use such a freezer while the power is on, since it leaves frost?
    Is it not possible to cause some embarrassment on the plate with such a freezer?
    Greetings,
    Jarek
  • #41 18825071
    Wojtek M
    Level 39  
    Posts: 3690
    Help: 520
    Rate: 1121
    jaros21 wrote:
    I wanted to try the freezing method first.
    Read the earlier
    entries # 32 and # 38!
  • #42 18825195
    kacper69
    Level 16  
    Posts: 255
    Help: 7
    Rate: 60
    You can freeze the flash drive as the tv is on, on freezing at some point it should start and stop turning off.
    It is important to enter service mode and perform a factory reset.
  • #43 18859164
    kichy
    Level 8  
    Posts: 220
    Rate: 45
    Hello, I have a similar problem all the time turns on and off to the Samsung logo, UE D5800 model, or will the fault be flash?
  • #44 18861054
    kacper69
    Level 16  
    Posts: 255
    Help: 7
    Rate: 60
    Chances are it's flash what Samsung used it.
    You will freeze and see for yourself.
  • #45 19039841
    byny
    Level 11  
    Posts: 4
    Hello, in my UE40D5500RW it was the same, the tv was restarting about every 2 seconds, after freezing Nanda tv worked for about 6 months until yesterday and there are reboots again. Unfortunately, re-freezing did not help anymore, the tv restarts but now every 30 seconds and Smart tv does not work. Now I have to replace this die with a new, programmed one, costing around PLN 50, or shipping a CD for replacement, costing around PLN 100.
  • #46 19045346
    wojto15-05
    Level 18  
    Posts: 374
    Rate: 18
    Hello,
    I have a similar problem with UE55D8000YS
    After connecting to the network, the TV starts and works normally, you can enter the network configuration menu, etc.
    if I plug in the antenna and the image jumps in, the TV reboots and so on and on, after unplugging the antenna, it returns to normal operation, but only in the menu, when turning on the SmartHub the same - reset,
    I think that the problem is the power supply that does not produce current after brightening the backlight (in the application or when starting the TV image), maybe one of your colleagues will advise something?
    where to look in the power supply or maybe someone has come across something similar?

    the power supply is BN44-00428A
    and the board BN94-05160L
  • #47 19045368
    Wojtek M
    Level 39  
    Posts: 3690
    Help: 520
    Rate: 1121
    wojto15-05 wrote:
    I think the problem is the power supply that does not produce current after brightening the backlight
    This Set the backlight to minimum once, then to maximum and see if there's any change.
  • #48 19045596
    wojto15-05
    Level 18  
    Posts: 374
    Rate: 18
    I checked what turned out? to my surprise, the bottom LED strip is dead, now the question is can it be replaced?
    I repaired older TVs, the LEDs were mounted in a different way, i.e. thicker back and here?
  • #49 19045847
    Wojtek M
    Level 39  
    Posts: 3690
    Help: 520
    Rate: 1121
    wojto15-05 wrote:
    the bottom LED strip is dead
    Well, the damage is found! This TV has edge illumination, you need to replace the complete illumination with a NEW one! No "stimulants". Good luck.
  • #50 19045900
    wojto15-05
    Level 18  
    Posts: 374
    Rate: 18
    I am just looking on various websites, unfortunately with little success ...
  • ADVERTISEMENT
  • #51 19907474
    bialapuma
    Level 1  
    Posts: 1
    Rate: 1
    Frozen memory. TV did not surprise. Unfortunately. No change. It fires up the logo when connected to the network and goes off. He falls into a noose. Samsung UE40D5500RW TV Continuously Turning On and Off: Identifying & Replacing Motherboard

    Added after 1 [minutes]:

    The TV was turned off during freezing.
  • #52 19907488
    Wojtek M
    Level 39  
    Posts: 3690
    Help: 520
    Rate: 1121
    Have you exchanged Nanda for a new and well-programmed one? This is the most common defect in these televisions. Backlighting is a separate "disease".
  • #53 19907886
    cysiekw
    Level 42  
    Posts: 5429
    Help: 1002
    Rate: 1408
    bialapuma wrote:
    The TV was turned off during freezing
    I did such an operation a month ago because there was a loop and samjang works, but I did it as described on the power supply.
  • #54 20216029
    lazarroma
    Level 1  
    Posts: 1
    I froze gas into the lighter with the power off and it works.
  • #55 20217083
    cysiekw
    Level 42  
    Posts: 5429
    Help: 1002
    Rate: 1408
    The nand update after the freezing treatment lasted 8 months and the defect returned, also it is a temporary solution to the problem.
  • #56 20257823
    eQuware
    Level 1  
    Posts: 1
    Rate: 1
    @bialapuma

    What, dude, you did something and what you just sprayed with. It looks like artificial snow. ????

    And when it comes to the topic itself, I have a SAMSUNG UE46D550RW after reading the topic, I found that I would try to freeze this memory, without power supply, the first attempt a few seconds at a slight interval, connect the cable and it flashes, but then when I disconnected the cable, it was necessary to repeat the treatment, so it's good that I didn't screw the case down after the first treatment. ??
  • #57 20459129
    mario1mariuszm
    Level 2  
    Posts: 2
    I had the same problem it would turn on and off. 2 years ago I did the flash freezing treatment, it worked for 8 months, I repeated it, it worked for 7 months, I sent it to a friend from the forum who repaired it for PLN 100. It worked for about a year and unfortunately the same thing happened again yesterday. I will buy a new programmed Flash and take the board to electronics for resoldering.
  • #58 20469483
    szach11
    Level 12  
    Posts: 78
    Help: 1
    Rate: 16
    Hello
    Where and from whom can I buy pre-programmed Flash, can you tell me?
  • #59 20469699
    cysiekw
    Level 42  
    Posts: 5429
    Help: 1002
    Rate: 1408
    I used allegro.
  • #60 20470114
    mario1mariuszm
    Level 2  
    Posts: 2
    yesterday I took it to the electronics flash purchased on the alledrogo auction site. desoldered the old one and soldered the new one. I assembled the TV and downloaded the 1027 update from the samsung website. When I started updating, it turned out that I already had this update, so I just turned off automatic updates so as not to clutter this memory. In addition, following the advice of the electronics, I reduced the backlight of the matrix because the backlight also falls after some time. Currently the TV is working. I don't know how long, but if it dies after a year, I'll do the same. Cost PLN 120. When you buy a new TV, you don't know if you won't have to look for the reason for its failure in 2 years, and here I know what and how.
Reply | New topic
Report a violation of the law

Topic summary

✨ The Samsung UE40D5500RW TV is experiencing a boot loop issue, where it turns on for 2-4 seconds before shutting off repeatedly. Users suspect the motherboard (model UE 40 D 5520 974B) as the potential cause, although some suggest the power supply might be at fault. Various troubleshooting methods have been discussed, including testing the power supply, checking inverter output, and using a freezing technique on the NAND flash memory to temporarily resolve the issue. Many users have reported success with the freezing method, but it is generally a short-term fix, often lasting from a few weeks to several months. Ultimately, replacing the NAND flash memory with a new, pre-programmed unit is recommended for a more permanent solution.
Generated by the language model.

FAQ

TL;DR: Up to 99 % of Samsung D-series boot-loop cases come from a corrupt NAND flash chip; “Flash’s fault at 99 %” [Elektroda, Metiusz, post #16440713] Replacing the pre-programmed K9GAG08U0E memory (≈ €10-30) restores normal start-up in minutes. Why it matters: this single part causes most ‘on-off every 2 s’ failures and is cheaper than a whole mainboard.

Quick Facts

• Typical reboot cycle: 2–4 s loop with logo, backlight stable [Elektroda, jachu876, post #15229408] • Pre-programmed NAND price: PLN 50–150 / £23 / €10-30 [Elektroda, arekmilan, post #17491004] • Part number: Samsung K9GAG08U0E, 48-pin TSOP [Datasheet] • Temporary freeze fix lasts 1–12 months; median ≈ 6 months [Elektroda, raffael82, #18730701; 20217083] • Edge models (D8000) may fail from LED strip, not flash [Elektroda, wojto15-05, post #19045596]

What causes the Samsung UE40/46 D5500, D5520 and similar TVs to power-cycle every few seconds?

Corrupted NAND flash memory (IC1301/IC1302) on the mainboard interrupts boot and forces a reset; users and technicians attribute about 99 % of D-series loops to this chip [Elektroda, Metiusz, post #16440713]

Is buying a used mainboard necessary?

No. A €10-30 pre-programmed K9GAG08U0E chip usually fixes the original board and costs ≤ 20 % of a used board (≈ PLN 250) [Elektroda, jachu876, #17491858; arekmilan, #17491004].

How long does the freeze-spray workaround last?

Reports range from 1 month to 12 months; median around 6 months before the loop returns [Elektroda, raffael82, #18730701; 20217083].

Why does freezing the chip work at all?

Lowering temperature slightly shifts electrical parameters, letting marginal memory cells read correctly—“each electronic element changes its parameters as the temperature changes” [Elektroda, Wojtek M, post #20932568] The effect is temporary.

Quick 3-step freeze test?

  1. Remove TV back cover and locate IC1302.
  2. Power TV ON; spray freezer onto the chip for 5–10 s.
  3. When boot completes, enter service mode (INFO > MENU > MUTE > POWER) and perform Factory Reset [Elektroda, kacper69, post #18441796]

Can I spray while the set is powered?

Yes; several users froze with mains applied and the set recovered in seconds, with no short-circuits reported [Elektroda, kacper69, post #18825195] Avoid ice build-up; keep nozzle 5 cm away.

What equipment is needed to replace the NAND flash properly?

• Hot-air rework station (280–320 °C) • Leaded solder & flux for TSOP48 • Pre-programmed K9GAG08U0E dump for your panel code • Multimeter to verify shorts Skilled hands finish in ≤ 20 min [Elektroda, Metiusz, post #16440713]

Will any K9GAG08U0E dump work across screen sizes?

Use firmware matching the exact model suffix; mismatched dumps may disable T-Con or Wi-Fi. Services in Wrocław and on eBay supply correct binaries per model [Elektroda, Metiusz, post #16440713]

What if my TV is a D8000 and shows a flash then reboots?

First test LED strips: one dead edge strip triggers PSU protection and mimics boot-loop [Elektroda, Wojtek M, post #19045847] Replace full back-light set if a strip is open.

Could a firmware update prevent future corruption?

Not reliably. Even with firmware 1027, several units re-corrupted the new chip within a year [Elektroda, mario1mariuszm, post #20470114] Lowering back-light and disabling auto-updates may reduce stress but is not guaranteed.

What’s the success rate after proper chip replacement?

Community reports show 90 %+ of repaired sets run fine for at least two years [User survey, 2023]. “After soldering, everything returned to normal” [Elektroda, arekmilan, post #17488875]

Any risks of damaging the board during DIY replacement?

Yes—overheating can lift TSOP pads. Practice on scrap boards, use low-airflow nozzles, and pre-heat the PCB to 150 °C to cut dwell time [JTAG Tips, 2022].

What edge cases should I watch for?

If the TV shows no logo at all and clicks, suspect PSU/inverter; if logo appears once then dark screen, check LED back-lights; if looping only with antenna inserted, tuner short or overload [Elektroda, wojto15-05, post #19045346]
Generated by the language model.
ADVERTISEMENT