Note: To remove the in-flight power connector from the adapter, grasp the
connector sleeve and slide it backwards to unlock the connector.
Continue to pull the connector sleeve to remove the connector. To
prevent damage, do not pull on the cord to remove the connector.
3. Plug the 4-pin connector into the 4-pin airline seat power receptacle (see
3 in Figure 4). The LED on the power adapter should illuminate. If the
LED does not light, ask the flight crew to check the in-flight power system.
4. Insert the smaller, yellow-tipped connector into the power connector of
your ThinkPad computer (see 4 in Figure 4). Make sure the ThinkPad
computer is charging by checking the power icon on the system tray in the
lower right-hand corner of the screen. The icon displays as a plug if the
computer is charging or as a battery if it is not charging.
Figure 4. Connecting to an in-flight power system
Note: Some newer aircraft may use the automobile style power receptacle.
Connecting the adapter to a standard electrical outlet
To use the power adapter with a standard electrical outlet, follow these steps:
1. Slide the cover on the end of the adapter box to expose the AC power
connector. Plug the matching end of the AC power cord here (see 1 in
2. Plug the larger end of the AC power cord into any standard, 100-240 volt
electrical outlet (see 2 in Figure 5). The LED on the power adapter should
IBM ThinkPad 72W AC/DC Combo Adapter: User's Guide