Hi I just purchased 727 for P3D and face kinda same problem

i.imgur.com/SrcHSHh.jpg

When I start up the P3D and choose the vehicle all the screens are dark, okay it's cold and dark, I knew it.
So I pushed the battery button but does not turn on...
Then I found out that if the button is "OFF" position, the OFF supposed to be illuminated but it's not.
Am I doing wrong?

Thanks in advance.