UE43KU7500UXSQ won't turn on, and the standby power led is off

[Itay]

Hi,
The TV won't turn on, and the standby power led is off.
My TV model is UE43KU7500UXSQ.
I tried replacing PSU, Model: L40E6_KSM (BN44-00875A), But it didn't Help.
When I disconnect power cord from the main board and power up the TV I get back light so the only thing left is the main board.
The main board model is BN94-10783C, but I cant find this part anywhere.
Any suggestion about how can I find out what's wrong with the board, or find a proper replacement?
Is there any generic model that can work with my TV? (BN94-10783A/B maybe?)
Or even an official Samsung support where I can ask those questions?

[AndrewL]

@Itay: Sorry to hear that you're experiencing this issue. Based on what you've described and the troubleshooting steps you have attempted, I recommend reaching out to a Samsung Support Centre to arrange for an engineer to inspect the TV. To find your nearest one please check the following link, select 'TV & AV > Television' and enter your post code.

http://www.samsung.com/uk/support/servicelocation/