Lenovo Y470, Y570 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 IdeaPad Y470/Y570 Regulatory Notice First Edition December Copyright Lenovo Contents Page „ Y470 Getting to know your computer„ Y570 Wireless moduleGetting to know your computer Antennas Computer displayIndicators Volume buttons Getting to know your computer Power buttonOneKey Rescue System buttonUSB combo port USB port RJ-45 portMicrophone jack Getting to know your computer Headphone jack „ Y470 „ Y570 AC power adapterUSB combo port TV-in jack On select models Optical driveDevice switch Processing Unit Switch on select ModelsGPU Graphics Bottom view Battery pack Battery latch manual „ Configuring the operating system „ Connecting to the powerLearning the basics „ Reading the manualsPutting your computer into sleep state Learning the basicsShutting down your computer „ Charging the battery „ Checking battery status„ Removing the battery pack „ Handling the batteryTouchpad button Y470 „ Numeric keypadY570 „ Function key combinations Learning the basics „ Connecting a universal serial bus USB device „ Using memory cards not suppliedInserting a memory card Removing a memory cardEnabling Bluetooth communications on your computer „ Connecting a Bluetooth deviceMute/Unmute Volume down Volume up „ Volume buttons b- d„ OneKey Rescue system button a „ OneKey Theater button e Super silent mode Standard modeEfficient thermal dissipation mode Performing dust cleaningSystem status indicators Page „ Using passwords „ Using VeriFace„ Attaching a security lock not supplied Enabling Nvidia Optimus on select models Enabling 3D Vision „ Using 3D Vision on your computer„ Software configuration Connecting to the Internet„ Hardware connection CableConnecting to the Internet „ Using Wi-Fi/WiMAXEnabling wireless connection Software configuration„ Introduction OneKey Rescue systemFrequently asked questions TroubleshootingWhen do I need to restore the system to the factory status? TroubleshootingPassword problem Display problemsKeyboard problems Computer screen problems Troubleshooting Sleep or hibernation problemsSound problems Hard disk drive problem Troubleshooting Battery problemsStartup problem OneKey Rescue system problemsTroubleshooting Other problems Appendix. CRU instructions Handling a hard disk drive Appendix. CRU instructionsAppendix. CRU instructions Appendix. CRU instructions Appendix. CRU instructions Sdram Appendix. CRU instructions Appendix. CRU instructions Removing the optical drive Trademarks Page New World. New Thinking.TM
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