Repair nightmare with Samsung LCD/LED experts pls help!

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • fabes253
    New Member
    • Nov 2013
    • 5
    • United States

    #1

    Repair nightmare with Samsung LCD/LED experts pls help!

    I have a Samsung UN55C7100 and I am in a repair nightmare. Please if anyone has knowledge I would greatly appreciate help.

    1st - One day the Panel went out, it had vertical lines through it. Samsung agreed to replace the panel so a technician came out and replaced the panel and F-Con board.

    2nd - A week later the TV died, apparently it was a power supply board. I ordered a new power supply board (refurbished) and replaced it myself, The TV worked for a week and then it seems like the power supply board went out again!

    Is this just my bad luck? Or is there something with the new panel that is blowing the power supply boards? Currently it makes a click sound like it does when it will come on, then you can hear a power sound like its trying to power up, and nothing happens. It repeats the click and power sound over and over.
  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #2
    Re: Repair nightmare with Samsung LCD/LED experts pls help!

    Do you not have a lemon law in the states? Samsung should come out and replace that board, or offer you a refund / discount on a new TV.
    It's more likely you have a main board fault than a power board fault, IMO.
    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

    Comment

    • fabes253
      New Member
      • Nov 2013
      • 5
      • United States

      #3
      Re: Repair nightmare with Samsung LCD/LED experts pls help!

      Well the TV is out of warranty by a year. Through my many complaints they finally agreed to replace the panel. They said they would not do anything else for me considering. Would a bad main board cause a power supply board to fail?

      Comment

      • mmartell
        Badcaps Legend
        • Oct 2013
        • 3189
        • Canada

        #4
        Re: Repair nightmare with Samsung LCD/LED experts pls help!

        Not sure on this model you would have to find the service manual or the field guide...

        Unplug cable from power supply to main board. Plug set in. Do the backlights come on ? If so suspect main board. If not suspect power supply or backlight system (leds).

        Comment

        Related Topics

        Collapse

        • Tynan Dill
          Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?
          by Tynan Dill
          I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.

          Upon bringing it home and plugging it up, it showed a standby light.

          I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.

          The screen seems to blackout and stay black, but with a flashlight I can see the display.

          With my Playstation 4 connected via HDMI, and running a game I can hear sound.

          Assuming...
          11-22-2024, 01:46 PM
        • Nicktronic
          Samsung Power Supply Board BN44-00874F
          by Nicktronic
          Hey everyone,

          This power supply board is hard to find but there are repair kits available. This board had a blown fuse, FP801S, blown PFC MOSFET, QP802CS and ceramic cap, CP809. I replaced them with parts I already had and tested the rest of the parts that would've come in the repair kit and they were fine. I powered the board up on the bench expecting, in typical Samsung power supply board fashion, to see all my output voltages but, nothing. 0 volts on CNL801, CNM801 and CNT801. The only thing I have is 170vdc on the filter caps. No standby voltage either.

          Anybody...
          03-17-2025, 06:20 AM
        • sam_sam_sam
          Panasonic switching power supply daughter board has two 27uf @ 50 volt capacitors which I do not keep in stock
          by sam_sam_sam
          I did not have any 27uf @ 50 volt capacitors but one nice thing is that it has enough room for two capacitors in parallel a 22uf and a 4.7uf @ 50 volts 22 plus 4.7 equals 26.7uf which so very close to 27uf I will show some pictures of it sometime tomorrow

          This is one of the shit est boards I seen in a very long time and it was the daughter board the traces just lifting off the board I had to use the capacitor leads to repair the the traces and the main board is not any better because I had to repair several traces for the daughter board to the main board

          After all of...
          07-13-2024, 08:14 PM
        • repair-it
          Need advice testing a samsung power supply board with scope
          by repair-it
          I am attempting to test a samsung power supply board to verify the pfc ic is working. I am powering up the board with my isolation transformer. The board turns on fine but when I attempt to connect the ground for the scope probe, it trips out the isolator. I was taught not to 'float my scope' so I am wondering if I should test without connecting the ground lead or would that be asking for trouble? Not sure how else to test, I don't have a portable scope. I could plug direct to mains power but that would bypass the safety factor.
          07-12-2025, 11:00 AM
        • m1ch43lzm
          HP Pavilion 15-eh Board DAG7HAMB8F0 - CPU throttling to 0.4GHz (PROCHOT_EXT) and black screen
          by m1ch43lzm
          Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
          Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic...
          05-12-2025, 08:37 PM
        • Loading...
        • No more items.
        Working...