Sony KDL-46XBR6 completely dead

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  • max-power
    Dell E6540 laptop completely dead after dssasembly
    by max-power
    Hi, I disassemble my laptop to replace the speakers, to access them, you have to remove everything including the heat sink and fan, unscrew the motherboard, lift it up a bit to access the speaker wire.
    that was not the first time I dissasemble it, i did replace the same speaker a few year ago and I repaste it last year, so I had nothing to worry about. but when I put everything back together, its completely dead.

    After a bit of investigating, i found one pin of the status led ribbon cable that was unglued from the cable and bend touching another pin, I bend it back at his place...
    03-24-2025, 08:49 AM
  • Zaprodk
    Sony KD-55X8507C Completely dead
    by Zaprodk
    Hi.
    I have a Sony KD-55X8507C on the mending table today.

    It appears completely dead, no status LED's lighting up. Even though it's acting completely dead, the power supply is running and the heatsinks on the main ASIC's do heat up, so it's just not starting properly.

    This thread has been a lot of help since someone posted an excerpt from a schematic that contains the correct LED driver chip. without that pinout, anyone's guess

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    08-07-2020, 04:06 AM
  • wangbreeze
    T480s random shutoff and then completely dead
    by wangbreeze
    Hello Gurus,

    I got a ThinkPad T480s. It was running fine but suddenly started random shut down. When it turned off, I had to push the reset pin to bring it back to life. But it got aggressively worse and became completely dead. No charging light, no life.

    I did some initial diagnostics with just the board (no battery, nothing attached, and no CMOS battery as well)

    Initial testing of the coil resistance seems to indicate no dead short. The only low resistance I measured was at PL701. It reads 38 ohms.
    charger gave - 20V - ok

    U101B
    ...
    02-03-2024, 04:57 PM
  • thstuff
    Sony OLED XR-77A80J - Initially dead, now 4 Flashes
    by thstuff
    A) TV initially dead
    B) On a hunch of a locked up Google OS, plugged in a USB memory stick with latest FW and plugged it in. It booted into the update screen, completed the update and restarted to Home screen.
    C) Was able to perform a Reset from Settings menu and completed out of box configuration.
    D) Ran a 4K screen saver demo for about 6 hours, then turned it off for the day. Did not notice any stripes, dead zones or other artifacts in the image.
    E) Powered back on and it now runs for a few minutes before relay clicks, screen goes blank, Main Board Red Digital Optical...
    12-26-2024, 09:10 PM
  • pavski
    Completely dead MSI z490 tomahawk
    by pavski
    Trying to troubleshoot MSI z490 tomahawk board and would appreciate your help. The board is completely dead and shows no activity when the power button is pressed.

    I have tried to look at the Superio, the PSIN signal seems to be correct (goes from 3.3V to 0 on button press) but the voltage on PSOUT pin is quite low. I

    t is only 0.8V which seems to be incorrect but goes to 0 when the button is pressed.

    Can you please let me know if this is indeed incorrect and what else should I look at next?

    Thanks!
    06-02-2024, 02:42 PM
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