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UN70NU6900FXZA power cycle, no picture - workaround found

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  • Mgiffune
    Samsung UN60EH6000F Black Screen, Backlight and Sound Good. Power Cycle Returns Picture
    by Mgiffune
    I have a 60 inch Samsung UN60EH6000F flatscreen TV. The screen went black a few months ago Sound is good, backlight is good, no menu. I replaced the TCon board with a used board purchased from Ebay. It worked fine for a 3-4 months, then the screen started ‘fading' back. Once again, sound is good, backlight is good, no menu. However, this time the picture looks fine for about 10-15 minutes, then fades back. If I power cycle the TV, the display reappears, for another 10-15 minutes, then fades black again. Repeatable ever time.

    I ordered a supposedly ‘new' Tcon board this time, and
    ...
    06-09-2024, 10:28 AM
  • Ierwin
    Samsung UE60KU6079 backlight okay mainboard responsive, no picture, no sound
    by Ierwin
    Hello everyone,
    Ive got a UE60KU6079 on the workbench that is giving me some headaches trying to troubleshoot.
    The previous owner stated that there had been white dots on the screen which from the description sounded like some lenses fell of the backlight LEDs.
    He had opened the TV from the back, trying to get to the backlight, supposedly gave up, reassebled everything and gave the TV to me.
    I expected the worst like ripped COF cables or a cracked panel but could not find anything like that yet.
    Anyway I still fully expect that there has been something seriously damaged...
    05-13-2025, 03:31 PM
  • re-atari
    MSI A520M Pro mainboard - need boardview and/or hires photo's of components surrounding RT8894 PWM controller
    by re-atari
    Hi all,

    Recently I was donated a defective MSI A520M Pro rev. 1.0 mainboard, that I am now trying to get back on its feet again. The error description when I received it, was that it wouild not boot, with the CPU error led lighting up.

    When inspecting the board with a magnifying glass, I noticed someone had slipped with a screwdriver when installing the CPU cooler. Not just once, but 2 times at that. Go figure. In the end the result was 2 scratches with damaged copper traces and a few knocked off (and missing) components around the RT8894 PWM controller. No wonder the...
    01-21-2026, 11:58 AM
  • TR103
    Samsung 8K TV (2018) model QE65Q900RAL, boot loop
    by TR103
    I have a Samsung 8K TV (2018), model QE65Q900RAL. The TV does not power on and there is no backlight. The standby LED is on normally. After pressing the power button, the LED turns off, but after approximately 10 seconds it flashes an error code: 1 blink, which indicates a mainboard issue. After that, the TV enters a boot loop: the relay inside the One Connect Box clicks and the cycle repeats.

    I checked the mainboard and both backlight driver boards. All voltages appear normal, there are no shorts, and there is no visible damage.

    The backlight is controlled via a flat...
    05-16-2026, 03:25 AM
  • Tr0ll
    T-con suspect issue. Both ribbon cables no picture. One ribbon cable ok. (58pus8545)
    by Tr0ll
    Hi guys! I realized you have a lot of knowledge here so i am hoping you could point me in right direction with my odd issue.

    The Tv is a Philips 58PUS8545/12, it had no picture but working backlights.

    Original T-con:
    Opened the Tv and tested to unplug one ribbon cable at a time. With this test i could see that i got fine picture on both halves as long as there was only one ribbon cable connected, with two connected picture were gone.

    First replacement T-con:

    I thought it might be t-con and ordered new t-con from china(supposedly tested)...
    10-07-2023, 07:48 PM
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