Lenovo U260 manual Troubleshooting Sleep or hibernation problems, Computer screen problems

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U260 User Guide V1.0_en.book Page 21 Monday, October 4, 2010 12:11 PM

Chapter 5. Troubleshooting

Sleep or hibernation problems

The critical low-battery error message appears, and the computer immediately turns off.

The computer enters sleep mode immediately after Power-on self-test (POST).

•The battery power is low. Connect the AC adapter and run the computer on AC power.

•Make sure that:

-The battery is charged.

-The operating temperature is within the acceptable range. See “Chapter 2. Use and care Information” of Lenovo Safety and General Information Guide.

Note: If the battery is charged and the temperature is within range, have the computer serviced.

The computer does not return from sleep mode and the computer does not work.

•If the computer does not return from sleep mode, it may have entered hibernation mode automatically because the battery is depleted. Check the power indicator.

•If your computer is in sleep mode, connect the AC adapter to the computer, then press any key or the power button.

•If your computer is in hibernation mode or power-off state, connect the AC adapter to the computer, then press the power button to resume operation.

Note: If the system still does not return from sleep mode, your system has stopped responding, and you cannot turn off the computer; reset the computer. Unsaved data may be lost. To reset the computer, press and hold the power button for 4 seconds or more. If the computer still does not reset, remove the AC adapter.

Computer screen problems

The screen is blank.

The screen is unreadable or distorted.

Incorrect characters appear on the screen.

•Do the following:

-If you are using the AC adapter, or using the battery, and the battery status indicator is on, press Fn + ↑ to make the screen brighter.

-If the power indicator is in blinking, press the power button to resume from the sleep mode.

-If the problem persist, follow the solution in the following problem “The screen is unreadable or distorted.”

-Press Fn+F2 to confirm whether the LCD screen has been turned off.

•Make sure that:

-The display device driver is installed correctly.

-The screen resolution and color quality are correctly set.

-The monitor type is correct.

•Did you install the operating system or application program correctly? If they are installed and configured correctly, have the computer serviced.

Sound problems

No sound can be heard from the

• Make sure that:

speaker even when the volume is

- The Mute function is off.

turned up.

- The headphone mic combo jack is not used.

 

- Speakers are selected as the playback device.

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Contents IdeaPad U260 Regulatory Notice If your product is not working correctlyContents Page Top view Getting to know your computerAntennas Select Models only Computer display Power button Wireless moduleGetting to know your computer Select models onlyKensington slot Left-side viewUSB port Headphone micRight-side view Fan louvers Bottom viewFirst use Learning the basicsLearning the basics „ Shutting down your computer„ Checking battery status Using AC adapter and battery„ Charging the battery Left click button Using the touchpadRight click button „ Numeric keypad Using the keyboard„ Function key combinations Learning the basics „ Connecting a universal serial bus USB device Connecting external devices„ Connecting a Bluetooth device Select models only Enabling Bluetooth communications on your computer„ OneKey Rescue system button Special keys and buttonsSystem status indicators „ Using passwords „ Using VeriFaceSecuring your computer „ Attaching a security lock not suppliedWired connection Connecting to the Internet„ Software configuration „ Hardware connection„ Using Wi-Fi/WiMAX Select models only Wireless connectionOneKey Rescue system OneKey Rescue system„ Introduction Frequently asked questions TroubleshootingTroubleshooting TroubleshootingDisplay problems Password problemComputer screen problems Troubleshooting Sleep or hibernation problemsSound problems Hard disk drive problem Troubleshooting Battery problemsStartup problem OneKey Rescue system problemsTroubleshooting Other problems „ What this warranty covers Appendix A. Lenovo limited warranty„ How to obtain warranty service „ What your service provider will do to correct problemsAppendix A. Lenovo limited warranty „ Replacement of a product or part„ Your additional responsibilities „ Use of personal information „ What this warranty does not cover„ Limitation of liability „ Other rights „ Dispute resolution„ European Economic Area EEA Product or Machine type Country or region of purchase Warranty information„ Types of warranty service Appendix A. Lenovo limited warranty Energy star information Appendix B. Product specific NoticesWindows Appendix B. Product specific Notices„ Federal Communications Commission FCC Statement Electronic emissions notices„ Avis de conformité à la réglementation d’Industrie Canada „ Industry Canada Class B Emission Compliance Statement„ German Class B Compliance Statement „ European Union Compliance Statement Class B Compliance Model Name IdeaPad U260 Machine Type 20067/0876 Form Factor Appendix C. SpecificationsSystem PortsTrademarks Index Problems
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