Lenovo Z475 Troubleshooting Password problems, Keyboard problems, Sleep or hibernation problems

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Chapter 5. Troubleshooting

Password problems

I forgot my password.	• If you forget your user password, you must take your
	computer to a Lenovo authorized servicer or a marketing
	representative to have the password changed.
	• If you forget your HDD password, a Lenovo authorized
	servicer cannot reset your password or recover data from
	the hard disk. You must take your computer to a Lenovo
	authorized servicer or a marketing representative to have
	the hard disk drive replaced. Proof of purchase is required,
	and a fee will be charged for parts and service.
	• If you forget your supervisor password, a Lenovo
	authorized servicer cannot reset your password. You must
	take your computer to a Lenovo authorized servicer or a
	marketing representative to have the system board
	replaced. Proof of purchase is required, and a fee will be
	charged for parts and service.

Keyboard problems

A number appears when you	• The numeric lock function is on. To disable it, press Fn + F8.
enter a letter (Z475).

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.

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Contents IdeaPad Z475/Z575 Regulatory Notice First Edition April Copyright Lenovo Contents Page „ Z475 Getting to know your computerTop view Getting to know your computer „ Z575Thermal management button Camera Wireless module antennas Computer displaySpeakers Power button OneKey Rescue system button Getting to know your computer IntegratedRJ-45 port Left-side viewFan louvers VGA portCombo port USB port ESATA/USB Getting to know your computerRight-side view „ Z475 „ Z575Optical drive Getting to know your computer RJ-45 port Front view Integrated wireless device switch Memory card slotBottom view Battery pack „ Reading the manuals „ Connecting to the power„ Configuring the operating system Learning the basicsPutting your computer into sleep state „ Shutting down your computerLearning the basics „ Charging the battery „ Checking battery status„ Handling the battery „ Removing the battery packUsing the touchpad „ Numeric keypad Z475 Using the keyboardZ575 „ Function key combinations Learning the basics Inserting a memory card Connecting external devicesRemoving a memory card „ Connecting USB devices Enabling Bluetooth communications on your computer „ Connecting Bluetooth enabled devices on select models„ OneKey Rescue system button a „ Volume buttons b~dSpecial keys and buttons „ OneKey Theater button e „ Thermal management button f Standard modeSuper silent mode Efficient thermal dissipation modePerforming dust cleaning System status indicators „ Attaching a security lock not supplied „ Using VeriFaceSecuring your computer „ Using passwords Wired connection Connecting to the InternetConnecting to the Internet „ Software configuration„ Hardware connection Wi-Fi WiMAX Wireless connectionHardware connection Software configuration„ Introduction OneKey Rescue systemOneKey Rescue system OneKey Rescue system „ Creating a recovery discsOneKey Rescue system Frequently asked questions TroubleshootingWhere can I find warranty information? Display problems TroubleshootingKeyboard problems Troubleshooting Password problemsSleep or hibernation problems Puter does not work Computer screen problemsStartup problem Troubleshooting Sound problemsBattery problems Hard disk drive problemRespond Troubleshooting Other problemsAppendix A. CRU instructions Replacing the battery packAppendix A. CRU instructions Handling a hard disk drive Replacing the hard disk driveZ475 Z575 Pull the tab in the direction shown by arrow d Take out the hard disk drive secured in a metal frame e Appendix A. CRU instructions Replacing memory Appendix A. CRU instructions Appendix A. CRU instructions Removing the optical drive Setup Poster User Guide Trademarks Page New World. New Thinking.TM

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