Thanks a lot. The problem is, that my backlight works in comparison to his video. As soon as I connect the main baord, the backlight goes off.

And it does not matter, whether I connect the LCD or not (TCON). It goes off.

Hello, I have a Q60 Samsung. As soon as I plug in the mainboard, the backlight turns off. It doesn`t make any difference to unplug the display cables, speakers or anything else. Means, even if I attach the mainboard without any other cable being attached, the backlight turns off immediately (when pluging in the power board cable to the main board

So I assume, it is not the power board or either the screen, right? But are there any parts on the main board I could check?

Thanks a lot

Marco