Lenovo ThinkPad T420si (English) User Guide - Page 25

Rear View, ThinkPad Mini Dock Plus Series 3 - thinkpad t420s power adapter

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Rear View Figure 5. ThinkPad T420s/T420si rear view 1 Power jack 3 USB connector (rear) 5 DisplayPort connector 7 Fan louvers (rear) 2 Ethernet connector 4 Always On USB connector 6 Monitor connector 1 Power jack The ac power adapter cable connects to the computer power jack to provide power to the computer and charge the battery. 2 Ethernet connector Connect your computer to a LAN with the Ethernet connector. 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 upper 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 upper right indicator is solid green. While data is being transmitted, the upper left indicator blinks yellow. For details, refer to the instructions in "Access Connections" on page 20. Note: If you attach your computer to the ThinkPad Port Replicator Series 3, ThinkPad Mini Dock Series 3, ThinkPad Mini Dock Plus Series 3, or ThinkPad Mini Dock Plus Series 3 (170 W); and use an Ethernet connector, use the Ethernet connector on the ThinkPad Port Replicator Series 3, ThinkPad Mini Dock Series 3, ThinkPad Mini Dock Plus Series 3, or ThinkPad Mini Dock Plus Series 3 (170 W), not the one on the computer. Chapter 1. Product overview 9

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Rear View
Figure 5. ThinkPad T420s/T420si rear view
1
Power jack
2
Ethernet connector
3
USB connector (rear)
4
Always On USB connector
5
DisplayPort connector
6
Monitor connector
7
Fan louvers (rear)
1
Power jack
The ac power adapter cable connects to the computer power jack to provide power to the computer and
charge the battery.
2
Ethernet connector
Connect your computer to a LAN with the Ethernet connector.
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 upper 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 upper right indicator
is solid green. While data is being transmitted, the upper left indicator blinks yellow.
For details, refer to the instructions in “Access Connections” on page 20.
Note:
If you attach your computer to the ThinkPad Port Replicator Series 3, ThinkPad Mini Dock Series
3, ThinkPad Mini Dock Plus Series 3, or ThinkPad Mini Dock Plus Series 3 (170 W); and use an Ethernet
connector, use the Ethernet connector on the ThinkPad Port Replicator Series 3, ThinkPad Mini Dock
Series 3, ThinkPad Mini Dock Plus Series 3, or ThinkPad Mini Dock Plus Series 3 (170 W), not the one
on the computer.
Chapter 1
.
Product overview
9