Dell Inspiron 7500 Setup Manual page 18

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When the drive is in use, the drive-access indicator blinks on the front of the drive
bezel.
When using a CD-ROM or DVD-ROM drive, follow these guidelines:
•
Never use damaged, broken, or deformed discs.
•
Do not press the open/close button while the computer is accessing a disc.
•
Keep the disc tray closed when you are not using the drive.
Using Hardware Devices 3-7