Apple AppleCare Protection Plan for Apple Display - Manuel (Page 7)

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Try these simple steps before contacting Apple for help.
Before performing any of the following steps, make sure your computer
is turned on, the display is plugged into an outlet, all the cables are
connected properly to your computer and display, and your computer is
not in sleep mode.
If the screen doesn’t have an image:
• Check the cables and connectors again to make sure they are
connected properly to your computer and the display.
• Make sure your computer is turned on and is not in sleep mode.
If your computer’s display is closed, use the external keyboard or
mouse to wake the computer from sleep.
• Reset the PRAM by restarting your computer while holding down
the Command (x), Option, P, and R keys until you hear the startup
sound a second time.
If the screen is dim:
• Make sure the display brightness controls are set properly. Choose
Apple () > System Preferences and click Displays. Drag the
Brightness slider to adjust the brightness.
Quick Reference Guide
AppleCare Protection Plan for Apple Display