Vizio E48u-D0 not turning on, Pwr LED on and off

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • solderfly
    Member
    • Mar 2013
    • 13
    • USA
    #1

    Vizio E48u-D0 not turning on, Pwr LED on and off

    Hi everyone.
    Working on this LED TV.
    TV started with sound issues, would make like interference noise. One day it just did not turn on anymore.
    Replaced the power board already but no change in symptoms. TV makes no sound, has no picture but pwr LED is on. Upon remote power on, the pwr LED goes brighter and then slowly dims to off. The pwr LED does come on and goes off infrequently.
    On the main board connector J4 at top of board shows 18V on pin 1-4. I only measure 17.5V. Would that be an issue?
    Pin 9, PS-on, has no value printed but I measure 3.3V.
    Pin 10, BL-on, never shows any voltage.
    Is there some measurements to determine bad main board or bad BL LED?

    Thank you for your help.
    Attached Files
    Tags: None
    Previous template Next

    Related Topics

    Collapse
    • 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
    • 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...
      ORIGINAL POWER SUPPLY BOARD
      7 Photos
      11-22-2024, 01:46 PM
    • mrtek
      Vizio M65-C1
      by mrtek
      Hi.

      picked up another TV. This time is a Vizio M65-C1. TV does not turn on. I had repaired another 60 inch vizio , Bad main board.
      When power button is pressed, the Power led indicator on the bottom right, turns for a few seconds and then it fades away. No backlight or Vizio logo on screen. Removed back cover and repeated test.
      This is the TV This TV is a little different from the Samsung I have worked on. Power supply is on the Left side, Main Bd is on the right side, T-CON , not in the picture is on the bottom. I am assuming that the boards in the middle are the LED...
      07-14-2025, 07:28 PM
    • howardc64
      TCL 55S425 few horizontal lines, potential failure on both side of panel/buffer board
      by howardc64
      All left and right refers to looking from rear of TV (or looking from front with TV upside down)
      • TV came with vertical bars and no image. Found faulty TVS on left buffer board. Also replaced T-Con (may have damaged the original while hot air removing components, board has slight warp) and have full image but few horizontal lines on the screen. Some of the lines appears to be 2 pixel tall while others are 1 pixel tall.
      • Disconnecting left and right buffer board potentially reveals problems on both sides with different signals (unless this T-Con require jumper like Samsung FB_TRDY1&3) Fault
      ...
      07-24-2025, 05:17 PM
    • SS454
      vizio e650i-a2 backlight flashes then turns off
      by SS454
      vizio e650i-a2 (LWJAOZBP Serial) led backlight flashes then turns off, has video (via flashlight) and audio.

      panel: au optronics T650HVN05.4
      72 led total on 12 strips, 6 led per strip wired in three groups of 24 (led driver board has three anode and three cathode pins)
      link to datasheet: https://datasheetspdf.com/pdf-file/8.../T650HVN05.4/1

      Vizio 56.04219.641G (liteon PA-3231-01WN-LF) Power Supply Unit
      https://www.shopjimmy.com/vizio-56-0...-power-supply/

      Vizio 55.75J01.001G (91.75J10.004G) Main Board...
      08-20-2020, 03:57 PM
    • Loading...
    • No more items.
    Working...