UE49MU6400 (BN94-12399N) no standby

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Zhab27
    New Member
    • May 2022
    • 3
    • Ukraine

    #1

    UE49MU6400 (BN94-12399N) no standby

    Всім доброго дня!
    Режиму очікування немає.
    Перепаяв SPI 25Q40 і прочитав прошивку. У дампі перші байти не стираються. Записав дамп донора BN94-12399N, режим очікування з'явився з , але телевізор все одно не виходить в робочий режим. Будь ласка, допоможіть відновити рідний дамп!
    Last edited by Zhab27; 04-24-2024, 06:13 AM.
  • Zhab27
    New Member
    • May 2022
    • 3
    • Ukraine

    #2

    Comment

    • lotas
      Badcaps Legend
      • Jan 2016
      • 4654
      • Russia

      #3
      Try
      Attached Files

      Comment

      Related Topics

      Collapse

      • Yanleb
        UN65MU6300FXZC, no standby LED but power supply good. Bad IC1604 25Q40?
        by Yanleb
        Hi all,

        My UN65MU6300FXZC is dead and the standby LED stays off. The power supply is good. The main board is BN94-12434A.

        Disconnecting the main board from the power supply makes the backlight come ON.

        I did disconnect the panel cables and the WIFI modules, the board is still dead.

        I did read in many posts that IC1604 25Q40 becomes corrupted. It has proper 3.3 volt on VCC pin 8. I did read that if I post its dump here someone can fix it. Is that right?

        Thanks.
        11-18-2024, 12:34 AM
      • tvguy12012012120
        Zombie Samsung UN55NU6900F dead / no standby voltage - randomly came to life after hours of troubleshooting then died
        by tvguy12012012120
        This is my first attempt at troubleshooting a board like this, I know I could just buy a new board but I'm curious to figure out how this works. I've been testing different components in the evenings this week and I think the problem is with the IC failing to start up for some reason. When the board is plugged in there is no standby voltage.

        Then today it randomly sprung to life like a zombie but shortly died thereafter. I have no idea why it would have done that and its the first time I've seen it running. I discharged capacitors on the board last night, then it was sitting today....
        02-07-2025, 05:13 PM
      • fharris1977
        Vizio D50u-D1 Dead Set No Standby
        by fharris1977
        Hi. I got a Vizio with no power or standby, and won't turn on with remote or button. I checked the voltages on the connector and all read 0.00V or nearly 0(0.050 ON/OFF pin). None of the pins are labeled STB for standby although I do see some 5V pins. Other than the obvious standby led, which isn't coming on, is there a way to check for standby voltage on this PS. I'm trying to see if my problem is the PS or mainboard. Some Vizios I have fixed with no standby led me to think it was the PS but it turned out being the mainboard. Any experience with this set would be greatly appreciated.
        12-28-2023, 10:25 AM
      • Crystaleyes
        Samsung BN44-00259A standby question
        by Crystaleyes
        Hi all.

        I started a thread while back regarding TV power supply standby circuitry as it is something I am not quite on top of.
        SMPS theory and function is becoming more familiar, however the standby part is still a bit of a mystery.

        Anyway, a friend has this TV with the above mentioned power supply board which has no standby voltage, nor any other voltages leaving the board.
        The mains AC comes in fine, gets filtered and rectified with power is on the main filter cap as well as the transformer and drain pins of the ICE3B0665J, but that's it.
        ...
        08-11-2023, 05:15 AM
      • psssst
        Yamaha TSX 120 Standby Problem
        by psssst
        Hello forum. I've recently been given a Yamaha TSX 120 DAB radio and ipod dock. Its working well however when put on standby its using 6.3 watts. The manual states less than 1 watt on standby. I measured this with a plug in monitor which seems accurate with other items. In use it uses around 7.5 watts. Firstly has anyone who owns a similar radio also got a plug in monitor to check if this is normal with this unit? In the first half a second the monitor shows 0.3 watts which I suspect is what it should use but something is switching it to be almost fully powered. I've searched the manual for eco...
        03-01-2024, 07:25 AM
      • Loading...
      • No more items.
      Working...