Solution: Make sure that:

The display device driver is installed correctly.

The screen resolution and color quality are correctly set.

The monitor type is correct.

To check these settings, do as follows:

For Windows 7:

1.Right-click on the desktop, and click Personalize.

2.Click Display at the left.

3.Select Change display settings. Check whether the screen resolution is correctly set.

4.Click Advanced Settings.

5.Click the Adapter tab.

6.Make sure that the correct device driver name is shown in the adapter information window.

Note: The device driver name depends on the video chip that has been installed on your computer.

7.Click the Properties button. If you are prompted for an administrator password or confirmation, type the password or provide confirmation. Check the “Device status” box and make sure the device is working properly. If not, click the Troubleshoot button. Close the Properties window.

8.Click the Monitor tab. Check whether the color quality is correctly set, make sure other information is also correct.

9.Click the Properties button. If you are prompted for an administrator password or confirmation, type the password or provide confirmation. Check the “Device status” box and make sure the device is working properly. If not, click the Troubleshoot button.

For Windows Vista:

1.Right-click on the desktop, and click Personalize.

2.Click Display Settings and check whether the screen resolution and color quality are correctly set.

3.Click Advanced Settings.

4.Click the Adapter tab.

5.Make sure that the correct device driver name is shown in the adapter information window.

Note: The device driver name depends on the video chip that has been installed on your computer.

6.Click the Properties button. If you are prompted for an administrator password or confirmation, type the password or provide confirmation. Check the “Device status” box and make sure the device is working properly. If not, click the Troubleshoot button.

7.Click the Monitor tab.

8.Make sure the information is correct.

9.Click the Properties button. If you are prompted for an administrator password or confirmation, type the password or provide confirmation. Check the “Device status” box and make sure the device is working properly. If not, click the Troubleshoot button.

For Windows XP:

1.Right-click on the desktop, and click Properties to open the Display Properties window.

2.Click the Settings tab.

3.Check whether the screen resolution and color quality are correctly set.

4.Click Advanced.

5.Click the Adapter tab.

Chapter 10. Troubleshooting computer problems 219

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Lenovo X220I TABLET, X220 TABLET, X220-4287, 42872W5, 42875TU, 4290WFZPC10D518, 42912XU, 429133U Click the Adapter tab

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.

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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.