Samsung TV reboots: switched-mode power supply not holding supply voltages?

[nenea dani]

You must disconnect the SW_POWER(POW/on/off) wire from the motherboard and leave it in the air. You should have 12V and 114V(for inverter) all the time if the power source is good. The wire is found on the power connector that feeds the motherboard, I think CN201, no. 2. if I'm not mistaken.

[inse]

Did you check whether the backlight including driver is working?
Is there a flashing pattern on the standby LED?

[Driekske]

I managed to replace a NAND chip in a Samsung UE46D5700.
This unit also got stuck in the boot sequence.

This chip with (software installed) ordered in France and on mainboard
put. TV set works properly again.

Costs €26.95 (incl. shipping costs).

https://www.mjkelectronics.com/en/samsung-mjk-electronics/246-samsung-…

MJK Electronics
contact@mjkelectronics.com
+33 768652794