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3 Hard disk drive
Your computer might have a large-capacity, customer-upgradable hard disk drive that can meet a variety
of storage demands. To keep the drive safe, the Active Protection System™ program is installed on your
computer. For details, refer to “Active Protection System” on page 21.
Note: The hidden service partition is the reason why there is less free space than expected on your hard
disk drive.
4 PCI Express Mini Card slot for wireless LAN
Your computer might include a PCI Express Mini Card for wireless LAN in the PCI Express Mini Card slot for
wireless LAN communications.
Rear view
Figure 6. ThinkPad Edge E425 and E525 rear view
1 Ethernet connector
2 Fan louvers (rear)
1 Ethernet connector
The Ethernet connector is used to connect your computer to a LAN.
DANGER
To avoid the risk of electrical shock, do not connect the telephone cable to the Ethernet connector.
You can only connect an Ethernet cable to this connector.
Two indicators, to the lower right and left of the connector, show the status of the network connection. When
your computer connects to a LAN and a session with the network is available, the lower right indicator is
solid green. While data is being transmitted, the lower left indicator blinks yellow.
10 User Guide