Solution: The cursor might drift when you are not using the TrackPoint pointing stick during normal operation. This is a normal characteristic of the TrackPoint pointing stick and is not a defect. cursor drifting might occur for several seconds under the following conditions:

–When the computer is turned on

–When the computer resumes normal operation

–When the TrackPoint pointing stick is kept pressed for a long time

–When the temperature changes

•Problem: The TrackPoint pointing stick or touch pad does not work.

Solution: Ensure that the TrackPoint pointing stick or touch pad is enabled in the ThinkPad Device Setting window.

Note: To open the ThinkPad Device Setting window, open Control Panel. Then click Hardware and Sound ➙ Mouse. Click the ThinkPad tab.

Keyboard problems

•Problem: All or some keys on the keyboard do not work.

Solution: If an external numeric keypad is connected:

1.Turn off the computer.

2.Remove the external numeric keypad.

3.Turn on the computer and try using the keyboard again.

If the keyboard problem is resolved, carefully reconnect the external numeric keypad and the external keyboard. Ensure that you have seated the connectors correctly.

If the problem persists, ensure that the correct device driver is installed.

1.Go to Control Panel. Change the view of Control Panel from Category to Large icons or Small icons.

2.Click Keyboard.

3.Select the Hardware tab. In the Device Properties pane, ensure that you see this message: Device

Status: This device is working properly.

If keys on the keyboard still do not work, have the computer serviced.

•Problem: All or some keys on the external numeric keypad do not work.

Solution: Ensure that the external numeric keypad is correctly connected to the computer.

Problems with the display and multimedia devices

This topic includes the most common problems with displays and multimedia devices, including the computer display, the external monitor, and the audio devices.

Computer screen problems

•Problem: The screen is blank.

Solution: Do the following:

–Press F7 to display the image.

–If you are using the ac power adapter, or using the battery and the battery gauge shows that the battery is not depleted, press F6 to make the screen brighter.

–If your computer is in sleep mode, press Fn to resume from the sleep mode.

–If the problem persists, follow the solution for the following problem.

122User Guide

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Lenovo 20AA Problems with the display and multimedia devices, Keyboard problems, Computer screen problems, Click Keyboard
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20AA, T431s, 20AA000MUS, 20AA000BUS specifications

The Lenovo ThinkPad series has long been a favorite among business professionals and tech enthusiasts alike, and the Lenovo 20AA000BUS, 20AA000MUS, and T431s models exemplify the brand's commitment to innovation, performance, and rugged design. These laptops are designed for enterprise users who require reliability and versatility in their everyday tasks.

The Lenovo 20AA000BUS model features a robust Intel Core processor that ensures smooth multitasking and quick application launches. Paired with a generous amount of RAM, users can easily run demanding applications and simultaneously manage numerous browser tabs without a hitch. The full HD display provides sharp visuals and vibrant colors which enhance productivity, whether one is working on spreadsheets, watching videos, or conducting presentations.

In terms of connectivity, these models boast several USB ports, HDMI output, and an SD card reader, which facilitate seamless integration with various peripherals and external devices. With the inclusion of robust wireless options, including Wi-Fi and Bluetooth, users can stay connected throughout their workspaces and collaborate effortlessly with coworkers.

Security features are a priority for Lenovo, and the 20AA000MUS model does not disappoint. Built with a fingerprint reader and a webcam privacy shutter, users can feel confident in their data safety. Lenovo's Trusted Platform Module (TPM) technology further enhances system security by encrypting sensitive data.

The T431s, a prominent model in this lineup, prides itself on its sleek and lightweight design, making it easily portable for professionals on the go. The carbon fiber and magnesium alloy chassis not only lends to its durability but also ensures that it withstands the rigors of daily travel.

Battery life is another highlight of these models, capable of lasting through an entire workday, which is a significant advantage for users who often find themselves away from power sources. The Quick Charge feature allows for rapid recharging, ensuring that users can quickly power up their devices before heading into meetings or events.

Overall, the Lenovo 20AA000BUS, 20AA000MUS, and T431s represent a blend of advanced technology, user-centric design, and robust security features. They stand out as reliable companions for professionals seeking efficiency and performance in their computing devices. Whether in the office or on the move, these laptops meet the demanding needs of the modern workforce.
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