1.Turn off the computer.

2.Make sure that the over-discharged battery pack is in the computer.

3.Connect the ac power adapter to the computer and let it charge.

If the optional Quick Charger is available, use it to charge the over-discharged battery pack.

If the battery pack cannot be fully charged in 24 hours, use a new battery pack.

•Problem: Your computer shuts down before the battery status indicator shows empty, -or-Your computer operates after the battery status indicator shows empty.

Solution: Discharge and recharge the battery pack.

•Problem: The operating time for a fully charged battery pack is short.

Solution: Discharge and recharge the battery pack. If your battery's operating time is still short, use a new battery pack.

•Problem: The computer does not operate with a fully charged battery pack.

Solution: The surge protector in the battery pack might be active. Turn off the computer for one minute to reset the protector; then turn on the computer again.

•Problem: The battery pack cannot be charged.

Solution: You cannot charge the battery when it is too hot. If the battery feels hot, remove it from the computer and allow it to cool to room temperature. After it cools, reinstall it and recharge the battery. If it still cannot be charged, have it serviced.

AC power adapter problems

•Problem: The ac power adapter is connected to the computer and the working electrical outlet, but the power adapter (power plug) icon is not displayed in the task bar. Also the ac power indicator does not light up.

Solution: Do as follows:

1.Make sure that the connection of the ac power adapter is correct. For connecting the ac power adapter, see the Setup Instructions manual included in the shipping contents of your computer.

2.If the above step is correct, turn off the computer, then disconnect the ac power adapter and uninstall the main battery.

3.Reinstall the battery and reconnect the ac power adapter, then turn on the computer.

4.If the power adapter icon still does not appear on the task bar and the ac power indicator does not light up, have the ac power adapter and your computer serviced.

Note: If your computer is a Windows 7 model, to display the power adapter (power plug) icon, click Show hidden icons in the task bar.

Power problems

Print these instructions now and keep it with your computer for reference later. If your computer is getting no power at all, check the following items:

1.Verify the power switch. Refer to “Status indicators” on page 18. The power switch is illuminated whenever the computer is on.

2.Check all power connections. Remove any power strips and surge protectors to connect the ac power adapter directly to the ac power outlet.

3.Inspect the ac power adapter. Check for any physical damage, and make sure that the power cable is firmly attached to the adapter brick and the computer.

Chapter 10. Troubleshooting computer problems 229

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Lenovo X220I TABLET, X220 TABLET, X220-4287, 42872W5, 42875TU, 4290WFZPC10D518 AC power adapter problems, Power problems
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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.

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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.

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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.
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