We will not accept return as broken or not described then you have to prove this as any issues with main board or backlight or even panel it self sometimes really difficult to figured out even with all right equipment.
Shipping both ways is on you when you return this board after we get the board and expect it .
Samsung BN96-23579A Main Board for LN40E550F7FXZA (Version SS04)
Please, read this before buying.