• Samsung Led TV UE48JU6410U / stanby led in loop on/off, and won't turn on (Solved)

It is currently 14 December 2024, 04:43

 [SOLVED] Samsung Led TV UE48JU6410U / stanby led in loop on/off, and won't turn on (Solved)

 Forum rules: Click here to view the forum rules

  1. Topic title should contain: the device's manufacturer, full model and the brief description of problem.
  2. Topic message should contain: the PCB marking code (required in case of hardware repairs), an extended description of problem, things you have checked/replaced/measured, your conclusions and the question. If you are not able to find the PCB marking code, please read THIS TOPIC. If you still cannot locate the PCB markings, please upload a clean, both-side photos of the mainboard - it is required to remove any films, modules or brackets possibly covering these markings.
  3. Before posting a new topic please read all topics in TRAININGS subforum and make a preliminary diagnostic based on the content of those trainings.
  4. Uploading of any complete schematics, BIOS / firmware files or any other kind of documentation, or linking to 3rd party websites with such files, is STRICTLY PROHIBITED. You can only upload the small portion of documentation or, link to BIOS file on UNVERIFIED BIOS FILES subforum, which simplifies the diagnostics/repair. You are not allowed to upload more then one complete page of instruction/schematic per single topic. The file you upload must not contain any watermarks, "confidential" markings, links or email addresses and cannot be password-protected.
  5. It is only permitted to describe one faulty device per single topic - you should always open a new topic for each subsequent device.
  6. Requesting of the full schematics, BoardView files, BIOS files or any other kind of documentation is NOT ALLOWED in this subforum. If you need to ask for any of these, you should open a new topic in DOCUMENTATION/BIOS REQUEST subforum.

#1 Samsung Led TV UE48JU6410U / stanby led in loop on/off, and won't turn on (Solved)

by Zemog • 15 February 2024, 12:52
Hello everyone. I have a Samsung UE48JU6410U television, which, when the power is turned on, the standby LED starts flashing and remains in a loop without ever entering sleep mode or turning on.

It has a BN44-00807D power supply. I checked to see if there were any shorted diodes or mosfets, but everything seems correct.
I have replaced the capacitors, CM855 to CM858 (470uf 25V), CM862 and CM863 (33uf 250V), C9371 (47uf) 50V, because although physically they seemed fine, when the supply is connected to the MAIN, slight clicking noises are heard in that area . The noise coincides in the following way: when the standby LED goes off you can hear it, and when the LED is on it is silent.

With the Power Supply empty (with nothing connected), I have checked the voltages on the CNM803 connector, and all the voltages are very unstable except pin 2 (ANA_DIM), which is stable at 3.2V

The value on the rest of the pins are:
Pins 3, 5, 7, 9 (A13V)... Very unstable
Pin 4 OD_ON/OFF ... 2.5V to 4V unstable
Pin 1 Fail_count...0V
Pin 6 PWM Blu...2V to 3.5V unstable
Pin 8 POWER ON .... 3V to 5V Unstable

Can somebody help me?

Re: Samsung Led TV UE48JU6410U / stanby led in loop on/off, and won't turn on (Solved)

by Google Adsense [BOT] • 15 February 2024, 12:52

#2 Re: Samsung Led TV UE48JU6410U / stanby led in loop on/off, and won't turn on

by Zemog • 16 February 2024, 13:26
I have connected the source to the MAIN and performed the measurements on CNM803 with it connected, the behavior being as follows:
When the standby light is on, the voltages are stable:
A13V...12.7V
Fail Count...3.2V
ANA DIM...3.2V
OD_ON/OFF ... 3.2V
PWM_BLU...0V
PowerON...3.2V

However, when the standby light goes off the values are:
A13V...the voltage drops to 3.1V then rises to 9V and then to 12.7V because it comes back on standby
Fail Count, ANA DIM, OD_ ON/OFF ... Drop to 0V
PWM_BLU .. When the standby LED turns off, it has a peak between 1.5V and 3V, and then drops to 0V. When the standby LED comes back on, the 3.2V returns

I have been able to get another source (supposedly working well), and the measurements without anything connected are also unstable, which is why I interpret that this source model, to have stable voltages, must be connected to the MAIN. Likewise, when connecting the new source used to the MAIN, the behavior is the same.

I have tried connecting the MAIN and the LEDs, leaving the flex to t-con disconnected but the error continues.

Is it possible that the fault is in the MAIN?

#3 Re: Samsung Led TV UE48JU6410U / stanby led in loop on/off, and won't turn on

by Zemog • 7 March 2024, 11:40
The problem has been solved and the TV has been repaired.
The fault was in one of the LED strips, which had been replaced months before. One of the LEDs was causing overconsumption, which caused the TV to protect itself and restart.
It has been replaced and the TV now works fine

Re: Samsung Led TV UE48JU6410U / stanby led in loop on/off, and won't turn on

by Google Adsense [BOT] • 7 March 2024, 11:40
Similar Topics
Asus MAXIMUS XII APEX r1.01BX RED LED DOES NOT TURN ON
  Samsung UE43TU8005K enters protection after changing the LED strips  [SOLVED]
Dell Latitude 5580 led blink 1 white 2 orange
Dell Vostro 15 3568 can't turn on
Acer Aspire 5749 DA0ZRLMB6D0 does not turn on
Acer H6510BD Projector - Wont turn on / Keeps crashing

Who is online

Users browsing this forum: No registered users and 2 guests

_______________________________
All rights reserved. Unauthorised copying of this website's content or any of its part is strictly forbidden.
Any trademarks, brand names, products or services published on this website belong to their legal owners, are copyrighted and used for information purposes only.