Lenovo 4294CTO, X220I TABLET, X220 TABLET, X220-4287, 42872W5, 42875TU, 42912XU Integrated camera

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Wireless WAN (auxiliary) and Wireless LAN/WiMAX (auxiliary)

Wireless LAN (third), Wireless WAN (main), and Wireless LAN/WiMAX (main)

The built-in antennas for the wireless communication are located at the top left and the top right portions of your computer display.

For the specific locations of each antenna, refer to “Location of the UltraConnect wireless antennas” on page 244.

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Integrated camera

Some models have the integrated camera. By using this camera, you can take pictures or hold a video conference.

For more information about how to use the camera, refer to “Using an integrated camera” on page 78.

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Built-in microphones

The built-in microphones capture sound and voice when they are used with an application program capable of handling audio.

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Computer display

The high-resolution, thin-film transistor (TFT) display provides clear and brilliant text and graphics.

For details, refer to the instructions in “Changing display settings” on page 70.

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Fingerprint reader

Some models have the fingerprint reader. The fingerprint authentication technology enables you to use your fingerprint to start the computer and enter the ThinkPad Setup.

For details, refer to the instructions in “Using a fingerprint reader” on page 100.

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Power switch

Use the power switch to turn on the computer. To turn off your computer, use the Start menu shutdown options.

If you cannot turn off the computer by this method, press and hold the power switch for 2 seconds.

If your computer stops responding, and you cannot turn it off, press and hold the power switch for 4 seconds or more. If the system is still not reset, remove the ac power adapter and the battery.

The power switch can also be programmed via Power Manager to shut down the computer or put it into sleep (standby) or hibernation.

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ThinkVantage button

You can use the ThinkVantage button to interrupt the startup sequence of your computer and start the Rescue and Recovery workspace, which runs independently of the Windows operating system and is hidden from it.

Note: If your computer is a Windows 7 model, you can press ThinkVantage button to open Lenovo ThinkVantage Toolbox.

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PCI Express Mini Card slot for wireless LAN/WiMAX

Your computer might include a PCI Express Mini Card in the PCI Express Mini Card slot which enables wireless LAN/WiMAX communications.

6User Guide