Dell Inspiron 5000 - Manual (Page 19)

Using Hardware Devices 3-7
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:
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Disable the autoplay feature while you are using the drive.
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Never use damaged, broken, or deformed discs.
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Do not press the open/close button while the computer is accessing a disc.
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Keep the disc tray closed when you are not using the drive.