Lenovo G550, 2958XFU manual Display problems, Password problem, Keyboard problems

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Chapter 5. Troubleshooting

Troubleshooting -------------------------------------------------------------------------------------------------------------

If you do not find your problem here, see Chapter 2. The following section only describes problems that might negate the need to refer to the more comprehensive information in Chapter 2.

Display problems

When I turn on the computer, nothing appears on the screen.

When I turn on the computer, only a white cursor appears on a blank screen.

My screen goes blank while the computer is on.

•If the screen is blank, make sure that:

-The battery is installed correctly.

-The AC adapter is connected to the computer and the power cord is plugged into a working electrical outlet.

-The computer power is on. (Press the power button again for confirmation.)

-The memory is installed correctly.

•If these items are properly set, and the screen remains blank, have the computer serviced.

•Restore backed-up files to your Windows environment or the entire contents of your hard disk to the original factory contents using OneKey Recovery. If you still see only the cursor on the screen, have the computer serviced.

•Your screen saver or power management may be enabled. Do one of the following to exit from the screen saver or to resume from sleep or hibernation mode:

-Touch the touchpad.

-Press any key on the keyboard.

-Press the power button.

A Password problem

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 enter	• The numeric lock function is on. To disable it, press Fn + Insert.
a letter (G450).

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Contents G450/G550 User Guide Page Respective Users Explanation of hard disk capacity Dear userContents Unpack Important safety information„ Read this first Working placeImportant safety information On usingService and upgrades Getting to know your computer „ Lenovo G550„ Lenovo G450 Getting to know your computerIndicators Speakers Volume buttonsPower button Specific models onlyRJ-45 port Kensington slotFan louvers VGA portOptical drive Microphone jack Headphone jack Bottom view Spring loaded Memory/CPU HDD compartment Battery latchHard disk drive Central processing Unit compartment G450Learning the basics „ Connect to the power„ Configure the operating system „ Read the manualsLearning the basics „ Shutting down your computerPutting your computer into sleep state „ Charging the battery Using AC adapter and battery„ Checking battery status „ Removing the battery pack„ Handling the battery Left click button„ Numeric keypad G550„ Function key combinations Volume up Volume down Mute/Unmute „ Volume buttons and OneKey Rescue System buttonVolume buttons a~c specific models only OneKey Rescue System button dSystem status indicators „ Attaching a security lock not supplied „ Using VeriFace„ Using passwords Utility„ Connecting an ExpressCard device specific models only „ Using memory cards not supplied„ Connecting a universal serial bus USB device Inserting a memory cardLearning the basics Inserting an ExpressCard/34 device Enabling Bluetooth communicationsPairing with a Bluetooth enabled device Removing an ExpressCard/34 devicePage Wireless network technology connect without wiring Using the computer network„ Software configuration „ Hardware connectionUsing the computer network Wireless connection„ Using Wi-Fi/WiMax specific models only Enabling wireless connection OneKey rescue system „ Using Lenovo OneKey Recovery in Windows „ Introduction Troubleshooting What can I do if the backup process fails? TroubleshootingWhen do I need to use the Back up my data feature? Password problem Display problemsKeyboard problems Troubleshooting Sleep or hibernation problems Computer screen problemsHard disk drive problem Troubleshooting Sound problemsBattery problems Startup problemTroubleshooting Other problems „ To replace the battery Replacing the batteryUpgrading and replacing devices Upgrading and replacing devices Replacing the hard disk driveHandling a hard disk drive Upgrading and replacing devices Page Upgrading and replacing devices Removing the optical drive Upgrading and replacing devices Appendix A. Getting help and service Calling the customer support centerAppendix A. Getting help and service Getting help around the worldWarranty Service Telephone Numbers Caring your computer „ Be careful about where and how you workAppendix B. Use, and care information „ Notice of static-electricity„ For outdoor use „ Be gentle with your computer„ Carry your computer properly „ Handle storage media and drives properly„ Take care in setting passwords „ Data safety„ Other important tips „ What if you are traveling? „ Ergonomic information„ Questions about vision? „ General tips for maintenance „ Cleaning your computer keyboard „ Cleaning the cover of your computer„ Cleaning your computer display „ How to obtain warranty service Appendix C. Lenovo limited warranty„ What this warranty covers „ What your service provider will do to correct problems„ Your additional responsibilities „ Replacement of a product or partAppendix C. Lenovo limited warranty Information„ Use of personal information „ What this warranty does not cover„ Limitation of liability „ Other rights „ Dispute resolution„ European Economic Area EEA „ Lenovo Turkey address Lenovo Technology B.V. Turkiye Istanbul SubesiCourier or Depot Service „ Types of warranty serviceCustomer Replaceable Unit CRU Service On-site Service Customer Carry-In or Mail-In ServiceAppendix C. Lenovo limited warranty Product Exchange Service Appendix D. Customer replaceable units CRUs Appendix E. Notices „ Export classification notice Appendix E. NoticesWindows XP Windows VistaWireless related information „ Wireless interoperability„ Safety information related to Mobile Broadband „ Usage environment and your healthElectronic emissions notices „ Federal Communications Commission FCC Statement„ 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 „ General recycling statement „ Japan Compliance Statement for Power line Harmonics„ Korea Class B EU Weee statementsJapan recycling statements „ Disposing of a Lenovo Computer ComponentsAppendix E. Notices „ Read first regulatory information Factory preinstalled Wireless LAN/WiMAX moduleAppendix F. Lenovo regulatory notice „ USA Federal Communications Commission FCCII. Preinstalled integrated Bluetooth module Appendix F. Lenovo regulatory notice„ Canada Industry Canada IC Factory preinstalled Wireless LAN modulesII Preinstalled integrated Bluetooth module IC Certification numberIV Exposure of humans to RF fields RSS-102 Modules de réseaux local sans fil pré-installé à l’usineII Module Bluetooth intégré préinstallé Numéro d’homologation IC„ Electronic emission notices Federal Communications Commission FCC StatementTested To Comply With FCC Standards „ Europe EU Declaration of Conformity Appendix F. Lenovo regulatory notice For model 512ANMMW For model 533ANMMW For model BCM94312MCG Declaration of Conformity Reference no TitleRestriction de bande de fréquence de l’Union Européenne EU Frequency band restriction Περιορισμός ζώνης συχνοτήτων ΕΕ Begränsning för EU-frekvensband Takmarkanir ESB á tíðnisviði Restrizzjoni fuq il-faxxa tal-frekwenza ta l-UE „ Notice for users in Ukraine „ Notice for users in Pakistan„ Notice for users in Morocco „ Notice for users in Brazil „ Notice for users in Saudi Arabia For model 512ANMMWFor model 533ANMMW For model BCM94312MCG For model BCM92046 „ Notice for users in UAE For models BCM94312MCG, 512ANMMW, 533ANMMW, and BCM92046„ Notice for users in India „ Notice for users in Indonesia„ Notice for users in Malaysia „ Notice for users in the Philippines„ Notice for users in Singapore „ Notice for users in Taiwan For models BCM92046, 512ANMMW, 533ANMMW, BCM94312MCGAppendix F. Lenovo regulatory notice Appendix F. Lenovo regulatory notice Appendix G. Features and specifications Trademarks Index Electronic emissions For US usersProblems IndexPage Do not Return IT to the Store New World. New Thinking.TM