Lenovo V570C, V470C manual Troubleshooting Sleep or hibernation problems, Computer screen problems

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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 getting low. Connect the AC adapter to the computer, or replace the battery with a fully charged one.

•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 is still not reset, remove the AC adapter and the battery.

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 jack is not used.

 

- Speakers are selected as the playback device.

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Contents Lenovo V470c/V570c Regulatory Notice Contents Page „ V470c Getting to know your computer„ V570c Numeric keypad V570c Built-in microphone Touchpad Getting to know your computerRJ-45 port „ V470cFan louvers VGA portUSB port „ V470c „ V570c Right-side viewGPU Graphics Processing Unit switch Select models only Device switch Select your computerMemory card slot Bottom view SIM card slot Select models only „ Reading the manuals „ Conncting to the power„ Configuring the operating system Learning the basicsShutting down your computer Learning the basics„ Handling the battery „ Checking battery status„ Charging the battery „ Removing the battery packRight click button Left click button„ Numeric keypad V470cV570c „ Function key combinations Learning the basics Removing a memory card „ Using memory cards not supplied„ Connecting a universal serial bus USB device Inserting a memory cardEnabling Bluetooth communications on your computer „ Connecting a Bluetooth device Select models onlyTo change the GPU, do the following Switching GPU Select models only„ OneKey Rescue system button Special keys and buttonsThese indicators inform you of the computer status „ V570c Page „ Using passwords „ Attaching a security lock not supplied„ Fingerprint reader Select models only Cable Connecting to the Internet„ Software configuration „ Hardware connectionSoftware configuration „ Using Wi-Fi/WiMAX Select models onlyConnecting to the Internet Enabling wireless connection„ Using Mobile Broadband Select models only Connecting to the Internet Inserting the SIM card V570c Connecting to the Internet Removing the SIM card „ Introduction OneKey Rescue systemFrequently asked questions TroubleshootingWhen do I need to restore the system to the factory status? TroubleshootingPassword problem Display problemsTroubleshooting Sleep or hibernation problems Computer screen problemsSound problems OneKey Rescue system problems Troubleshooting Battery problemsHard disk drive problem Startup problemTroubleshooting Other problems Page Handling a hard disk drive Appendix A. CRU instructionsAppendix A. CRU instructions Appendix A. CRU instructions Appendix A. CRU instructions Sdram Appendix A. CRU instructions Appendix A. CRU instructions Removing the optical drive only for V470c Trademarks If your product is not working correctly Do not Return IT to the StoreNew World. New Thinking.TM
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