If the keyboard problem is resolved, carefully reconnect the external numeric keypad, external keyboard, making sure that you have seated the connectors properly.

If the problem remains, make sure that the correct device driver is installed.

For Windows 7:

1.Click Start ➙ Control Panel. Change the view of the Control Panel from Category to Large icons or Small icons.

2.Click Keyboard.

3.Select the Hardware tab. In the Device Properties, make sure that the Device Status is This device is working properly.

For Windows Vista:

1.Click Start ➙ Control Panel.

2.Click Hardware and Sound, and then click Keyboard.

3.Select the Hardware tab. In the Device Properties, make sure that the Device Status is This device is working properly.

For Windows XP:

1.Click Start ➙ Control Panel.

2.Click Printers and Other Hardware, and then click Keyboard.

3.Select the Hardware tab. In the In the Device Properties, make sure that the Device Status is This device is working properly.

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

•Problem: A number appears when you type a letter.

Solution: The numeric lock function is on. To disable it, press Shift+ScrLk or Fn+NmLk.

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

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

Display and multimedia devices

This section includes the most common display and multimedia devices problems which are computer screen, external monitor, audio, and optical drive. Check these topics to learn more information.

Computer screen problems

•Problem: The screen is blank.

Solution: Do the following:

–Press Fn+F7 to bring up the image.

Note: If you use the Fn+F7 key combination to apply a presentation scheme, press Fn+F7 at least three times in three seconds, and the image is displayed on the computer screen.

–If you are using the ac power adapter, or using the battery and the battery status indicator is on (is green), press Fn+Home to make the screen brighter.

–If the sleep (standby) status indicator is on (is green), press Fn to resume from the sleep (standby) mode.

–If the problem persists, do the Solution in the problem below.

Note: If your computer is a Windows 7 model, it does not support the presentation scheme.

• Problem: The screen is unreadable or distorted.

218User Guide

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Lenovo X220 TABLET, X220I TABLET, X220-4287 Display and multimedia devices, Computer screen problems, Click Keyboard
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4291BR6PC10B616, 42875TU, 428742U, 4294CTO, X220-4287 specifications

Lenovo's X220i, X220i Tablet, and their respective models such as 42872W5, 42912XU, and 429133U are part of the ThinkPad series, renowned for their reliability, performance, and innovative features tailored for both business and personal use. The X220i and X220i Tablet stand out in the ultrabook category, offering a perfect balance between portability and functionality, making them ideal for professionals on the go.

The X220i features a 12.5-inch display, which delivers vibrant visuals and clear text, ensuring users can work efficiently in various lighting conditions. The display options may include HD resolutions with anti-glare technology, minimizing reflections and enhancing visibility. The X220i Tablet takes portability a step further by incorporating touchscreen capabilities, allowing for a more interactive experience, which is particularly useful for presentations and drawing applications.

Under the hood, both models are powered by Intel Core processors, providing solid performance for multitasking and demanding applications. The X220i comes with options for up to 8GB of RAM, ensuring smooth operation even when handling multiple applications simultaneously. Storage options typically include fast SSDs, which not only enhance boot times but also improve file access speeds, contributing to overall responsiveness.

A key feature of the ThinkPad series is its exceptional build quality. The X220i and X220i Tablet are constructed with durable materials, including magnesium alloy and reinforced hinges, designed to withstand the rigors of daily use. Additionally, they are tested against military specifications, ensuring reliability in challenging conditions.

Connectivity options are extensive, featuring USB 3.0 ports, a VGA port, and HDMI, allowing users to connect to various peripherals and external displays. Advanced wireless connectivity options such as Wi-Fi and Bluetooth enable seamless communication and file sharing.

Battery life is another area where the X220i series excels. The laptops are designed to last an extended period on a single charge, often exceeding 8 hours, making them suitable for long workdays without the need for a power outlet.

In conclusion, the Lenovo X220i, X220i Tablet, and their variants like 42872W5, 42912XU, and 429133U are exemplary devices that blend portability, performance, and durability. Ideal for professionals and students alike, these devices cater to a range of computing needs while maintaining a compact and lightweight profile.
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