Lenovo G455, G555 manual Display problems, Password problem, Keyboard problems

Page 33

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 (G455).

25

Image 33

Contents Lenovo G455/G555 First Edition January Copyright Lenovo Respective Users Dear user Explanation of hard disk capacityContents „ Read this first Important safety informationUnpack Working placeOn using Important safety informationService and upgrades „ Lenovo G555 Getting to know your computerGetting to know your computer „ Lenovo G455Specific models only Power buttonModels only Computer display TouchpadFan louvers Kensington slotRJ-45 port VGA portOptical drive Right-side view„ Lenovo G555 „ Lenovo G455 SpeakersMicrophone jack Headphone jack Bottom view Battery latch manual Battery pack Memory/Wireless „ Configure the operating system „ Connect to the powerLearning the basics „ Read the manuals„ Shutting down your computer Learning the basicsPutting your computer into sleep state „ Checking battery status Using AC adapter and battery„ Charging the battery „ Removing the battery packLeft click button „ Handling the battery„ Numeric keypad G455G555 „ Function key combinations OneKey Rescue System button a „ OneKey Rescue System buttonSystem status indicators „ Using passwords „ Using VeriFace„ Attaching a security lock not supplied Utility„ Connecting a universal serial bus USB device „ Using memory cards not suppliedInserting a memory card Removing a memory cardEnabling Bluetooth communications Pairing with a Bluetooth enabled deviceTo send files from the computer to the paired device „ Software configuration Using the computer networkWireless network technology connect without wiring „ Hardware connectionUsing the computer network „ Using Wi-Fi/WiMax specific models onlyEnabling wireless connection Hardware connection Wi-Fi/WiMax networkOneKey Rescue System OneKey Rescue System„ Introduction Frequently asked questions TroubleshootingTroubleshooting What can I do if the backup process fails?When do I need to restore the system to the factory status? Display problems Password problemKeyboard problems Computer screen problems Troubleshooting Sleep or hibernation problemsBattery problems Troubleshooting Sound problemsHard disk drive problem Startup problemYour computer does not respond Troubleshooting Other problemsUpgrading and replacing devices „ To replace the batteryHandling a hard disk drive Upgrading and replacing devicesUpgrading and replacing devices 111 Upgrading and replacing devices Removing the optical drive Upgrading and replacing devices Getting help on the Web Appendix A. Getting help and serviceGetting help around the world Appendix A. Getting help and serviceWarranty Service Telephone Numbers „ Be careful about where and how you work Appendix B. Use and care information„ Notice of static-electricity „ Carry your computer properly „ Be gentle with your computer„ For outdoor use „ Handle storage media and drives properly„ Data safety „ Take care in setting passwords„ Other important tips „ Ergonomic information Accessibility and comfort„ What if you are traveling? „ Questions about vision?„ General tips for maintenance „ Cleaning the cover of your computer „ Cleaning your computer keyboard„ Cleaning your computer display „ What this warranty covers Appendix C. Lenovo limited warranty„ How to obtain warranty service „ What your service provider will do to correct problemsAppendix C. Lenovo limited warranty „ Replacement of a product or part„ Your additional responsibilities Information„ What this warranty does not cover „ Use of personal information„ Limitation of liability „ Dispute resolution „ Other rights„ European Economic Area EEA Lenovo Technology B.V. Turkiye Istanbul Subesi „ Lenovo Turkey addressCustomer Replaceable Unit CRU Service On-site Service „ Types of warranty serviceCourier or Depot Service Customer Carry-In or Mail-In ServiceAppendix C. Lenovo limited warranty Product Exchange Service Appendix D. Customer replaceable units CRUs Appendix E. Notices Appendix E. Notices „ Export classification noticeWindows XP WindowsWindows Vista „ Wireless interoperability Wireless related information„ Usage environment and your health „ Safety information related to Mobile Broadband„ Federal Communications Commission FCC Statement Electronic emissions notices„ Industry Canada Class B Emission Compliance Statement „ Avis de conformité à la réglementation d’Industrie Canada„ German Class B Compliance Statement „ European Union Compliance Statement Class B Compliance „ Korea Class B „ Japan Compliance Statement for Power line HarmonicsWeee and recycling statements „ General recycling statement„ Disposing of a Lenovo Computer Components EU Weee statementsAppendix E. Notices Appendix F. Lenovo regulatory notice Factory preinstalled Wireless LAN/WiMAX moduleLenovo regulatory notice „ Read first regulatory informationAppendix F. Lenovo regulatory notice II. Preinstalled integrated Bluetooth moduleII Preinstalled integrated Bluetooth module Factory preinstalled Wireless LAN modules„ Canada Industry Canada IC IC Certification numberII Module Bluetooth intégré préinstallé Modules de réseaux local sans fil pré-installé à l’usineIV Exposure of humans to RF fields RSS-102 Numéro d’homologation ICFederal Communications Commission FCC Statement „ Electronic emission notices„ Europe EU Declaration of Conformity Tested To Comply With FCC StandardsAppendix F. Lenovo regulatory notice Appendix F. Lenovo regulatory notice For model BCM94313HMG2L For model AR5B95 For model BCM943225HM For model BCM92046MDGEN Declaration of Conformity Restriction 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 Pakistan „ Notice for users in Ukraine„ Notice for users in Morocco For model BCM943225HM „ Notice for users in in CroatiaFor model BCM94313HMG2L For model AR5B93 For model AR5B95 For model BCM92046MDGEN BCM94313HMG2L „ Notice for users in Brazil„ Notice for users in Saudi Arabia For model AR5B95 For model AR5B93 For model BCM943225HM For model BCM92046MDGEN „ Notice for users in UAE „ Notice for users in Indonesia „ Notice for users in India„ Notice for users in the Philippines „ Notice for users in MalaysiaFor model BCM94313HMG2L For model AR5B95 „ Notice for users in Singapore„ Notice for users in Taiwan „ Notice for users in Thailand100 BCM94313HMG2L, AR5B95, AR5B93, BCM943225HM, BCM92046MDGEN „ Notice for users in South Africa Appendix G. Features and specifications Trademarks 105 Index106 Do not Return IT to the Store New World. New Thinking.TM