To help prevent this from occurring, download and install Mac OS X v10.5.3 or later from Apple Downloads.
If the issue persists when running Mac OS X v10.5.3 or later, a quick reset of the display panel will reset the LED backlights.
The quickest way to reset the display is to use the following key combination:
- Press Control - Shift - Eject.
- After the display goes to sleep, wake it by pressing any key on the keyboard.