Hi,
this happened to me when i opened my Z the other day on the bus. I had left the Z in suspend and removed the sd before i turned it on so that the music player exited. So exact same situation now as you. I have a console tied to one of the hardware buttons, but rebooting didn\'t solve my problems. Basically you need to apply light at an angle, I used sunlight, and move the lcd brightness applet slider to turn back on the backlight.