LG 47lb580v

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • sordids999
    Badcaps Legend
    • May 2013
    • 2152
    • uk
    #1

    LG 47lb580v

    Hi guys
    Tv has flashing backlights
    Voltages
    12 v are 11.7
    24v are 23.7
    Drv-on 3.5
    Pw-on 3.5

    P801
    Voltages
    Pin 1 0.00 pin 3 145v fluctuating pin 5 0.00 pin 7 175v fluctuating
    Tried the backlight tester and the screen stays on with an image
    Also noticed on the main board bga has loads of dried flux possibly someone has tried heating the bga so tried gently heating up the main bga but now backlights don't flash on start up

    Thanks
    Attached Files
    Tags: None
    • Andrew F. Ali
      Badcaps Legend
      • Jan 2014
      • 2450
      • Trinidad & Tobago
      #2
      Re: LG 47lb580v

      I've observed that LG LCD and LED TVs suffer from BGA issues that are cured sometimes with re-heating. I am contemplating not recommending LGs to my friends, family and customers. Oh, I almost forgot...They suffer from Backlight failure frequently, too.

        Comment

        Previous template Next

        Related Topics

        Collapse
        • Cemal Odabasioglu
          MacBook Pro A1707 Motherboard Diagnostic Help – CD3215 heating and Fluctuating Rails
          by Cemal Odabasioglu
          Hello everyone,

          I'm currently diagnosing a MacBook Pro A1707 motherboard that does not power on. I've gathered some data but am stuck and need expert advice.
          Note that i'm a beginner in electronics and i'm trying to learn while trying to repair this macbook that my work gave me. I'm really curious and love understanding how thing works and i already learned so much.

          Only one usb c port is taking 20v and have 12.5v on PPBUS_G3H. when trying other ports, 2 are not going to 20v and one is going to 20v but the CD3215 is getting really hot.

          Observations...
          01-14-2025, 03:54 PM
        • max789
          Samsung UE48H6410 replaced Mainboard but backlights doesnt go on
          by max789
          Hello, I have a problem with my Samsung UE48H6410SSXZG with the main board BN41-02156A and the power board BN44-00709A. Everything seemed like this, the TV could no longer be switched on, the standby LED always flashed 5x2 times. Backlight was off and no sound from TV. Also made the flashlight test and there was no picture.

          I made the following tests:
          1. Disconnected the main board from Power Board = backlight works.
          2. Connected the main board and disconnected the T-Con = backlights does not work.

          So I ordered a main board from Ebay also BN41-02156A but from...
          01-18-2024, 06:56 AM
        • EasyGoing1
          The best way to drive a heating element?
          by EasyGoing1
          I've got this circuit that I've been playing with on a breadboard. I'm not happy with it mainly because the MOSFET gets too hot and generally controlling the temp of the heating element with the Arduino has proven to be a little more cumbersome than I would like.

          What I would like to know, is what is the best way to set up a circuit like this? The heating element is just a PCB and its going to be mounted under a 3D-printed enclosure that a lizard will use to warm his belly.

          This is the general setup that I have now.



          This is what the...
          01-25-2023, 11:29 AM
        • bpcannan
          VIZIO M557-G0: Backlights or ???
          by bpcannan
          'Morning,
          I get sound and picture when powering on the TV and its stays that EXCEPT that the left half of the screen will dim every few seconds then return to normal while the right side of the screen performs as designed.

          Did the soft and hard reset options pulling the plug, using the reet option in the vizio menu to no avail.

          I checked the mainboard - found some popped capacitors so replaced it - but that did not change the situation.

          I checked the t-con board. It is getting good power. Then I removed one ribbon cable to see if I could isolate...
          10-29-2023, 06:36 AM
        • jesterace
          Samsung UE49MU6400 acts dead until disconnecting backlights, then works.
          by jesterace
          Hi everyone I have this TV which was dead one day when I tried to turn it on. I've had the cover off and there was just a pulsating/electrical clicking/ticking noise from the PSU. I disconnected the mainboard as sometimes this works to just fire it up with backlights on? That didn't help. Same noise. Then I disconnected the backlight cable from the PSU and the TV came alive. It appeared to respond to the remote and i'm pretty sure it's fully operational when there is no backlight connected.

          However, I am in a dilemma.

          I tested the backlight outputs with the lights disconnected...
          10-20-2024, 10:15 AM
        • Loading...
        • No more items.
        Working...