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Samsung UE40D5700 TV turns off after 2 minutes and restarts

Gemelan Posted messages 2 Registration date   Status Member Last intervention   -  
Gemelan Posted messages 2 Registration date   Status Member Last intervention   -

Hello,

I have an UE40D5700 TV that’s giving me trouble.

- A few years ago the Nand was replaced due to the startup loop problem.

- A few months ago it suffered startup loops again, after a small shot of refrigerant spray and a firmware update, everything returned to normal.

- Today it starts normally but after about 2 minutes and 20 seconds it stops and resumes where it left off (Channel or HDMI).

I tested the motherboard in another identical TV (UE40D5700), same problem.

Since the other components are different, I conclude the problem is on the motherboard.

I performed several electrical resets, a hard reset (Gnd_SDA), and a factory reset.

I disabled power-saving features and automatic updates, and via the hidden menu I disabled the Watchdog..

I measured the PWR on/off voltage; it’s stable at 3.4 Volts when ON and drops to 0 Volts when OFF, then returns by itself to 3.4 Volts (ON).

Thanks for your help.


2 answers

  1.
    Gemelan Posted messages 2 Registration date   Status Member Last intervention   1
     

    On AliExpress, the motherboards only work with HDMI and USB; for use on a TV you need to add a decoder.

    That’s what I did on my other TV, it works correctly.

    1
  2. NonoM45 Posted messages 1047 Registration date   Status Member Last intervention   5
     

    Hello,

    Why not buy back a motherboard on !?

    See you later

    0