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2–8 Maintenance and Service Guide
External component identification
Left-side components
Item Component Description
(1) Power connector Connects an AC adapter.
(2) AC adapter light ■ On: The computer is connected to external power.
■ Off: The computer is not connected to external power.
(3) USB ports (2) Connect optional USB devices.
(4) Optical drive Reads optical discs and, on select models, also writes to optical discs.
(5) Optical drive light Blinking: The drive is being accessed.