Hello Lotas and all.
I have read here much and this community is very nice. Much to learn.
But I no longer make any progress and hope of your help.

I have a UE55KU6170UXZG Curved TV. I have changed the Mainboard BN41-02528A (with a UE55KU6179UXZG) and the PowerSupply but problem exists.

With the UE55KU6170UXZG M/B:
The Standby LED goes on and off, stays off for 30 seconds and repeat. No Backlight.

With the UE55KU6179UXZG M/B:
The Standby LED is steady on, no Backlight. If I press ON the Power LED goes off and then on, and stays on....

Hallo, my name is Dodo and I was born in 1985. I´m from Germany.
I hope to learn from this wonderful community.

Thanks
Dodo