Samsung LE46C750 TV, dead but backlight on.

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Andy A
    Member
    • Dec 2018
    • 11
    • UK

    #21
    Re: Samsung LE46C750 TV, dead but backlight on.

    The problem was a bad main board. Got a second hand one and all works fine now.

    I do have another problem that I didn't see before.

    The main chip has a large thermal pad between the back of the board/chip and the main metal frame of the TV chassis. The pad has some kind of sticky oil leaking from it and running down the chassis.

    Does this pad need replacing?

    I have never seen this before.

    Some pics of the thermal pad after being cleaned up.

    Size seems to be 60 x 60 x 7-8mm. Where can I order one of these?

    Thanks
    Attached Files
    Last edited by Andy A; 02-27-2022, 09:09 AM.

    Comment

    • Diah
      Badcaps Legend
      • Feb 2013
      • 6435
      • Germany

      #22
      Re: Samsung LE46C750 TV, dead but backlight on.

      leave it as its,, dont worry on it since yours tv working fine.

      Comment

      Related Topics

      Collapse

      • Document Archive
        Samsung Galaxy Book 2 Notebook Specification for Upgrade or Repair
        by Document Archive
        This specification for the Samsung Galaxy Book 2 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the Galaxy Book 2 boardview and Galaxy Book 2 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download...
        09-07-2024, 05:50 AM
      • sansanpartida
        Samsung QE82Q70RAT no backlight
        by sansanpartida
        Hi everyone!

        Hope you're all having a great day, and thank you very much for stopping by and taking the time to read this post to help me with my parents' Samsung TV.

        My issue: No backlight.

        Model: QE82Q70RAT
        Type No: QE82Q70RAT

        The TV was already serviced by Samsung once under warranty for the exact same issue, but six months after the fix, the backlight went out again. Now, Samsung is asking for nearly the same price as a brand new TV to fix this with the same 6-month guarantee.

        So hopefully, I can fix this cheaper.
        ...
        05-22-2024, 06:56 AM
      • cheebster
        Samsung QLED QN70Q6DTAF Dead 2 blinks Flashing Backlight
        by cheebster
        Hello, got a nice 70'' Samsung here that has this symptom, it's (it was) dead with flashing red light, backlight going on and off, looping trying to start up.

        So i digged here and youtube, and found the tape method. Got the tv to fire up, however i'm trying to understand what's wrong with it.

        At the bottom of the tv, on the panel's PCB there are 3 sections, each of them has 4 connecting tabs to the panel.

        So with convering a few pins the tv works, and i messed the flex cable doing so, waiting for a new one to come in to continue troubleshooting. ...
        09-28-2022, 08:08 AM
      • howardc64
        Samsung UN55NU7300F Curved TV. Half side backlight out. Fixed by just removing the rear snap cover
        by howardc64
        TV was fixed just after removing Samsung's rear snap cover.

        This curved TV's construction is rather interesting. When the snapped on back is removed, rest of the TV will relax the curvature. Top of LCD panel is loose as it wants to straighten out against the slightly curved bezel. Snapped back provide most of the curvature shape. So just simple disassembly of rear cover will allow the rest of the TV frame to relax its curvature. Thats probably what fixed it but no idea which connection. 4x LEDs are edge lit.

        Maybe PSU->backlight connector didn't have a good contact?...
        07-23-2025, 12:34 AM
      • howardc64
        Samsung QN75Q6FNA backlight no display, red LED blink 2x, fault in panel
        by howardc64
        • Prior owner tried a replacement main board. No difference.
        • Samsung 2x red blinking standby LED = panel fault
        • Jumpered FB_TRDY_1 (pin 1 CN1300 left. main tcon->left side buffer boards) and FB_TRDY_3 (pin 95 CN1301 right. main tcon->right side buffer boards) This allows testing individual T-Con (on main board) connection to panel on this Samsung. Found fault on left side (viewing from rear of TV)
        • Each side has 2 buffer boards, disconnected left side flex between 2 buffer boards. Fault is on the left most board.
        • Tape masking eventually isolated to CN1300 pin 15 (CKV4_GOA) Display
        ...
        07-19-2025, 10:54 PM
      • Loading...
      • No more items.
      Working...