Sony KDL-46HX751 Red LED blinks 5 times

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  • Nairolf
    Samsung DM32D – Red LED blinks 5 times, won’t start (possible mainboard issue)
    by Nairolf
    Hello,

    I have a Samsung DM32D display.
    When I try to power it on, the red LED blinks 5 times and nothing happens—the unit won’t start.

    Here’s what I have tried so far:
    1. Disconnected the cable between the mainboard and the power supply → the backlight turns on.
    2. Disconnected the main T-CON ribbon cable → same issue as before, the LED still blinks 5 times.
    3. Disconnected one of the two T-CON ribbons to the panel (tested each one separately) → same issue, the LED blinks 5 times.

    From these tests, I suspect the problem might be on the mainboard. Could anyone...
    08-24-2025, 03:47 AM
  • Daren87
    Sony 8K XBR-75Z8H White Screen Vertical Bars Tcon Code. Help Needed🙏
    by Daren87
    Hello everyone,

    I've recently been given a Sony 8k Z8H. It's got a white screen with two vertical black bars. At times it's given me the 5 blink Tcon code. Testing voltage on the Tcon I can see some low or missing voltage. I've done a basic visual check of cables and the COF. Not seeing anything obvious. The original Tcon seemed to have good caps until turning it over. On the bottom I found maybe 10 caps with both sides of the caps shorting to ground. I thought ok these caps and likely other components on the Tcon are shorted so let's try a replacement Tcon. I just received the...
    08-13-2023, 03:25 PM
  • netgearnetgear
    TCL 43S423 TCON OR PANEL FAULTY???
    by netgearnetgear
    Good day, I have a TCL TV: Model 43s423. After turning ON the TV, the ROKU TV logo appears with fine lines over the whole screen, then after a while there are vertical bands in the middle of the screen top to bottom and the TV tries to update its firmware but I do not have the remote to connect it to my new network connection. Also the Power ON light blinks 2 times in quick succession. When I remove the ribbon on the right of the tcon board the left side of the screen shows but with fine lines. If I remove the left side ribbon and connect the right side ribbon the whole screen is blank with...
    08-20-2025, 06:04 PM
  • kca
    LG 82UN8570AUD ~ TCON or PANEL?
    by kca
    Hello all ~

    Hope this finds you well. This LG 82UN8570AUD (April 2021 model) 4K UHD television has full audio capabilities but video is compromised / problematic.

    When I picked up this large LG tv it had a full black screen upon startup. Previous owner said it just went black one day. No popping sound or anything else of note.

    I got the display to work by taping off several traces of the right-hand side ribbon cable on the TCON that leads from TCON to PANEL. However, despite dozens and dozens of attempts to find the right combination / range of traces taped...
    08-31-2025, 06:38 AM
  • rimwall
    Sony KD-65x7500D - double image - Tcon or Panel?
    by rimwall
    This TV was showing a fine image and pulsing with a partial double image (offset vertically) every few seconds. I taped 8 clock pins on one ribbon cable from the Tcon to the panel. It stopped the double image, but some pulsing in intensity was still visible. I then taped another 8 clock pins on the same ribbon cable and the image is now ‘fixed’. Although I understand this results in some loss of resolution, presumably because the clock signal degrades as it passes horizontally across the screen.

    I am wondering - do these symptoms and ‘fix’ mean that it’s a Tcon fault or...
    11-18-2025, 02:09 AM
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