Tried all keyboard shortcuts prior to the gray screen showing up but it just comes up.
One thing I did notice is the white light in the front of the MacBook stays on when the laptop is closed, and turns off when the MacBook is open.
I unplugged all peripherals , restarted, still nothing. It charges from my wall adapter and also charges my iPhone via USB. Can't change the brightness on screen via keyboard or the keyboard backlight. Help?