Right, I've found the LCD Setting on the menu. It has a brightness and contract adjustment, and you can reverse the display. I've put maximum brightness and no backlight, so it must be a defect that I have on this machine.
id take the unit back to the place purchsed for a replacement
otherwise you could open the box and make sure that the cable is that holds the LCD to the mainboard is firmly in place. opening the box will void your warranty.
Had similiar problem with 7000s . No backlight on lcd and remote not working correctly .Opened box to find a loose connection between board and front panel and since i don`t have any soldering tools at home i just inserted pins into the plug and stick it together with a bit of glue. I know it`s not very profesional but does the job - no more problems after. So if you can`t get hold of the seller simply open the box and see what`s exactly happening there.