| Hold a flashlight directly on the screen. If you still can slightly see the content that should be there then your backlight is defective and you need to replace the screen. All screens sold by us now are LED and there is a replacement kit that includes a bit of extra items needed for the screen switch. Best to ask your local Martin support.
If you don't see anything you could have a defective screen cable, which you can also replace as a spare part.
If the console is less than two years old please contact your dealer you purchases this from for a warranty repair.