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Lenovo Y471A manual Troubleshooting Other problems, Your computer does not respond

Models: Y471A

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Chapter 5. Troubleshooting

Other problems

Your computer does not respond.

The computer does not start from a device you want.

The connected external device does not work.

•To turn off your computer, press and hold the power button for 4 seconds or more. If the computer still does not respond, remove the AC adapter and the battery.

•Your computer might lock when it enters sleep mode during a communication operation. Disable the sleep timer when you are working on the network.

•See the Boot menu of the BIOS setup utility. Make sure that the Boot Device Priority in the BIOS setup utility is set so that the computer starts from the device you want.

•Also make sure that the device from which the computer starts is enabled. In the Boot menu in the BIOS setup utility, make sure that the device is included in the Boot Device Priority list.

•Press F12 when the Lenovo logo appears on the screen while the computer is starting up to select the device you want the computer starts from.

•Do not connect or disconnect any external device cables other than USB while the computer power is on; otherwise, you might damage your computer.

•When using a high power consumption external devices such as an external USB optical disk drive, use external device power adapter. Otherwise, the device may not be recognized, or system shut down may result.

For more technical support, please visit consumer product website http://consumersupport.lenovo.com.

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Lenovo Y471A Troubleshooting Other problems, Your computer does not respond, The connected external device does not work

Contents

User Guide IdeaPad Y471AFirst Edition May Copyright Lenovo Regulatory NoticeChapter 1. Getting to know your ContentsChapter 3. Connecting to the Internet Chapter 5. TroubleshootingPage Chapter 1. Getting to know your computer Power button Wireless moduleindicators Volume buttonsHDMI port VGA portFan louvers d RJ-45 portRight-side view AC power adapterc d e USB combo portSystem status indicatorsMemory card slot For details, see “System status indicators” on pagea b c d b Battery pack c Battery latch - manualChapter 1. Getting to know your computer Bottom view„ Configuring the operating system „ Connecting to the powerInstalling the battery pack Connecting the computer to an electrical outletChapter 2. Learning the basics „ Putting your computer into sleep state or shutting it downPutting your computer into sleep state Shutting down your computer„ Checking battery status Using AC adapter and battery„ Charging the battery „ Removing the battery packTouchpad Using the touchpadTouchpad button Chapter 2. Learning the basics„ Function key combinations „ Numeric keypadUsing the keyboard Chapter 2. Learning the basicsChapter 2. Learning the basics The following describes the features of each function keyConnecting external devices „ Using memory cards not suppliedInserting a memory card Removing a memory cardChapter 2. Learning the basics „ Connecting USB devicesEnabling Bluetooth communications on your computer „ Connecting a Bluetooth deviceChapter 2. Learning the basics b Mute/Unmute c Volume down d Volume up „ Volume buttons b- dSpecial keys and buttons „ OneKey Rescue system button aMovie mode Normal modeIntelligent mode „ OneKey Theater button eSuper silent mode Standard modeEfficient thermal dissipation mode Performing dust cleaningd e f g a b cSystem status indicators Chapter 2. Learning the basicsb Num lock indicator c Hard disk drive indicator d Touchpad indicator Chapter 2. Learning the basics a Caps lock indicatore Power status indicator f Battery status indicator g Wireless communication indicator„ Using passwords „ Using VeriFace„ Attaching a security lock not supplied Chapter 2. Learning the basicsChapter 2. Learning the basics AMD Muxless ATI Switchable Graphics Technology PowerXpressMode 1 Select the graphics processor based on application needs Switchable Graphics in two modes on select modelsSwitching between Mode 1 and Mode Chapter 2. Learning the basics„ Software configuration Chapter 3. Connecting to the Internet„ Hardware connection CableChapter 3. Connecting to the Internet „ Using Wi-Fi/WiMAXEnabling wireless connection Software configuration„ Using Lenovo OneKey Rescue system without Windows operating system „ Using Lenovo OneKey Recovery within Windows operating systemChapter 4. OneKey Rescue system OneKey Rescue systemChapter 4. OneKey Rescue system „ Creating a recovery discsFrequently asked questions Chapter 5. TroubleshootingWhen do I need to restore the system to the factory status? Chapter 5. TroubleshootingA Password problem Display problemsKeyboard problems Chapter 5. TroubleshootingComputer screen problems Chapter 5. Troubleshooting Sleep or hibernation problemsSound problems speaker even when the volume isA hard disk drive problem Chapter 5. Troubleshooting Battery problemsA startup problem OneKey Rescue system problemsYour computer does not respond Chapter 5. Troubleshooting Other problemsThe computer does not start from a device you want The connected external device does not workAppendix. CRU instructions Replacing the batteryAppendix. CRU instructions Replacing the hard disk driveHandling a hard disk drive To replace the hard disk drive, do the following Appendix. CRU instructions5 Remove the frame fixing screws c Appendix. CRU instructions6 Pull the tab in the direction shown by arrow d 7 Take out the hard disk drive secured in a metal frame e Appendix. CRU instructionsReplacing memory Appendix. CRU instructionsAppendix. CRU instructions Appendix. CRU instructions To make sure that the DDR3 SDRAM is installed correctly, do as followsAppendix. CRU instructions Removing the optical driveTrademarks Page V1.0en-US New World. New Thinking.TMLenovo China