ACLU1/ACLU2 UMA NM-A272 REV 1.0 blinking led light

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • kalilinux25
    Badcaps Legend
    • Mar 2018
    • 2084
    • ZAMBOANGA SIBUGAY
    #1

    ACLU1/ACLU2 UMA NM-A272 REV 1.0 blinking led light

    When I test on the PU1207 chip the Pin 13 is shorted to ground




    and I dont have +1.3v and +3VALW



    When I plug the charger the led blinks and blink


    how can I find the short ?
    Tags: None
    • khaahk
      Badcaps Veteran
      • Dec 2013
      • 760
      • Estonia
      #2
      Re: ACLU1/ACLU2 UMA NM-A272 REV 1.0 blinking led light

      1. Sorry but the pictures are too small to be of any help
      2. Which led are you talking about (charger led, mainboard led, battery charge led?)
      3. 1.35V you get after power on for RAM, the controller that you are looking at has nothing to do with 3V and 5V. Look for PU904 (integrated SMPS with inbuilt transistors) which is generating 3V and PU905 for 5V respectively.

        Comment

        • mielta
          Badcaps Veteran
          • Apr 2015
          • 368
          • Germany
          #3
          Re: ACLU1/ACLU2 UMA NM-A272 REV 1.0 blinking led light

          Hi
          Open Jumper PJ316 + PJ317 and see witch side is shorted.

          Remove the ram to check if they are shorted

            Comment

            Previous template Next

            Related Topics

            Collapse
            • YasaCh
              Sony kdl 40p5500 red light keeps blinking 3 times
              by YasaCh
              Hello...
              my tv almost 2 years not powerd on and when i turned it on nothing happened and only 3 red light keeps blinking
              i opened the back cover no sign of damage on the powery suply or motherboard
              when i plug in the power i hear the reley sound like tik first and another tik..after that only red keep blinking..
              another thing is even after i unplugged the power, The tv keeps red blinking 3 times for 2 almost 2 munites
              2 Photos
              07-07-2025, 11:53 AM
            • Fergal22
              Samsung UE40F5300AK blinking red light
              by Fergal22
              Hi,
              I have the above tv that just shows a red light blinking twice 5 times, i have taken the back off and all the capacitors seem ok,
              When i disconnect the mainboard from the PSU all the led's light up blinking fast but as soon as i reconnect the mainboard back to the power supply i get the red light blinking again twice 5 times,
              I have attached pictures of the Mainboard, PSU and a small video (zipped) showing what happens when i disconnect the lead from the psu
              Any help would be appreciated...
              02-02-2023, 09:19 AM
            • matty24
              Samsung UE50MU6172 - red light blinking
              by matty24
              Hello. I have problem with Samsung UE50MU6172.
              TV won't turn on, red standby light is blinking.
              Power supply BN44-00807A is fine. I replaced it with the new one.​
              Main board BN41-02568B (BN94-12530E)

              I've read a dump (W25Q40CL). Can someone check it od fix it for me?...
              03-02-2025, 08:57 AM
            • norbiszoke
              Samsung 50AU7172, only blinking red light
              by norbiszoke
              Hello,

              We have this set here in our shop that is not ginving sign of life besides red light that is blinking one time after pressing the button and nothing more... After detaching the mainboard from the PSU (this set has separate board thank god?! or not...) the backlight comes on. After reattaching nothing besides red light.... Can anyone from the forum help me here? Thank you in advance. Here's a link with images of the mainboard and the memory IC's that are on it.


              Regards, Norbert!...
              04-17-2024, 06:54 AM
            • huzo
              HP 470 G5 blinking amber light no power
              by huzo
              The board is daox8cmb6eo and i can't find no boardview or schematics on the forum or anywhere...

              So i plug in the charger, amber light starts blinking ,there is 3.3V and 5V present, and 2.4V on the power button,board doesn't turn on, no shorts...
              I've tried flashing the bios...

              interesting thing is the battery was around 7,8V, and it's 11.1V battery, the mosfet near the battery is open, but not charging,i desoldered it,tested it and it's fine ,but the amber light kept going on the charger so i charged the battery with power supply and got it to about 10.5V...
              06-08-2023, 04:08 PM
            • Loading...
            • No more items.
            Working...