The rotary light on my CDJ 2000 nxs does not come on.

I have just bought my 1st two CDJs 2000 nxs, second hand. but one of them the rotary light does not come on, also the cd tray light doesn't come on.  Am not disappointment in getting it, but does anyone know how these can be fixed or what I can do? 

Regards

Da Roller