Sony KDL-48W657D (main board protect, green light steady at the same time red light s

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • FMstatic
    New Member
    • Jun 2021
    • 5
    • Philippines

    #1

    Sony KDL-48W657D (main board protect, green light steady at the same time red light s

    Diagnose (panel problem)
    - main board replaced- still no good
    - panel board check all supply present and correct voltage
    - hang flex ribbon main board to panel (error 5blink) but when connected again nonstop red blink no pose and green light steady
    -SDA and SCL supply 3.3v panel board
    -BL is good simulated
    Guys help me any suggestion
    Main board protect 12v shut off when connected to panel board
  • FMstatic
    New Member
    • Jun 2021
    • 5
    • Philippines

    #2
    Re: Sony KDL-48W657D (main board protect, green light steady at the same time red lig

    Main board replaced due to mcu BGA damage

    Comment

    • FMstatic
      New Member
      • Jun 2021
      • 5
      • Philippines

      #3
      Re: Sony KDL-48W657D (main board protect, green light steady at the same time red lig

      Where do i get the panel board diagram?
      How to bypass main board protect to panel to see the condition of panel appearance

      Comment

      Related Topics

      Collapse

      • howardc64
        A1312 (27” iMac 2009-2011) A1407 (Thunderbolt Display) A1316 (Cinema Display) Display Black Screen Repair
        by howardc64
        Problem

        This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached....
        08-04-2024, 10:36 PM
      • JDC
        (SOLVED) - ONN 100012588 No Power, Then Rebooting After Main Board Change
        by JDC
        ONN 100012588
        Issue: No Power, Then Rebooting After Main Board Change

        Short answer: replace main board and power board
        Technical answer: replace main board and Q306 & Q307 on power board.

        Long answer:

        TV wouldn't turn on. Power switch was fine which means the main board isn't processing the power on signal. Replaced main board. TV turns on now but randomly reboots. Bad main board? EEPROM? Tried to pull main board and got a shock touching the corner of the board. That's weird. C334 (450V 10uf) capacitor is still holding a high charge....
        07-15-2022, 07:39 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
      • cheeky2
        Is it possible to upgrade from a Vestel 17MB97 main board to a 17MB110 Main board?
        by cheeky2
        I suppose the real question is whether the existing pinouts from ether a 17IPS71 psu are cross compatible with a 17IPS12 psu? If they are then the exchange of the main boards should have no issues providing the screen is compatible with both main boards. Obviously you can change the screen configurations easily enough (providing you have the correct files) for the main board. Why may you ask would I do this? Well a lot of the smart features are no longer working on a Hitachi 48HBT62U main board I wish to give it a new lease of life!
        Obviously the same LVDS connector for the screen connection...
        05-25-2024, 03:27 AM
      • advant
        Driving a Sharp TCON/panel with a universal main board
        by advant
        This thread is about trying to get an Universal Main Board to work with a Sharp TCON and panel.

        I have a Sharp LC-46D85UN TV that has had a main board issue. Since this model is from 2009, I am not able to find an exact replacement of the main board. Instead, I decided to see if I can future proof this tv by getting a Universal Main Board (T53U21.2) from China to work with the Sharp TCON (CPWBX4291TPZA) and panel. The universal main board supports a 8 bit dual channel LVDS interface whereas the TCON requires a 10 bit dual channel LVDS input. I have modded the LVDS connector to match...
        02-03-2020, 12:25 AM
      • Loading...
      • No more items.
      Working...