Troubleshooting Other problems | Lenovo G555, G455 instruction

Chapter 5. Troubleshooting

Other problems

Your computer does not respond.	• 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.

The computer does not start from a device you want.

•See the Boot menu of the BIOS Setup Utility. Make sure that the Boot priority order 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 priority order list.

The connected external device does not work.

•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.

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Lenovo G555, G455 manual Troubleshooting Other problems, Your computer does not respond

Contents

Lenovo G455/G555 First Edition January Copyright Lenovo Respective Users Explanation of hard disk capacity Dear user Contents Important safety information „ Read this firstUnpack Working place Important safety information On using Service and upgrades Getting to know your computer „ Lenovo G555 „ Lenovo G455 Getting to know your computer Power button Specific models onlyModels only Computer display Touchpad Kensington slot Fan louversRJ-45 port VGA port Right-side view Optical drive „ Lenovo G555 „ Lenovo G455 SpeakersMicrophone jack Headphone jack Bottom view Battery latch manual Battery pack Memory/Wireless „ Connect to the power „ Configure the operating systemLearning the basics „ Read the manuals „ Shutting down your computer Learning the basicsPutting your computer into sleep state Using AC adapter and battery „ Checking battery status„ Charging the battery „ Removing the battery pack „ Handling the battery Left click button „ Numeric keypad G455G555 „ Function key combinations „ OneKey Rescue System button OneKey Rescue System button a System status indicators „ Using VeriFace „ Using passwords„ Attaching a security lock not supplied Utility „ Using memory cards not supplied „ Connecting a universal serial bus USB deviceInserting a memory card Removing a memory card Enabling Bluetooth communications Pairing with a Bluetooth enabled deviceTo send files from the computer to the paired device Using the computer network „ Software configurationWireless network technology connect without wiring „ Hardware connection „ Using Wi-Fi/WiMax specific models only Using the computer networkEnabling wireless connection Hardware connection Wi-Fi/WiMax network OneKey Rescue System OneKey Rescue System„ Introduction Troubleshooting Frequently asked questions Troubleshooting 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 Troubleshooting Sleep or hibernation problems Computer screen problems Troubleshooting Sound problems Battery problemsHard disk drive problem Startup problem Troubleshooting Other problems Your computer does not respond „ To replace the battery Upgrading and replacing devices Upgrading and replacing devices Handling a hard disk drive Upgrading and replacing devices 111 Upgrading and replacing devices Removing the optical drive Upgrading and replacing devices Appendix A. Getting help and service Getting help on the Web Appendix A. Getting help and service Getting help around the world Warranty Service Telephone Numbers „ Be careful about where and how you work Appendix B. Use and care information„ Notice of static-electricity „ Be gentle with your computer „ Carry your computer properly„ For outdoor use „ Handle storage media and drives properly „ Data safety „ Take care in setting passwords„ Other important tips Accessibility and comfort „ Ergonomic information„ 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 Appendix C. Lenovo limited warranty „ What this warranty covers„ How to obtain warranty service „ What your service provider will do to correct problems „ Replacement of a product or part Appendix C. Lenovo limited warranty„ 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 Turkey address Lenovo Technology B.V. Turkiye Istanbul Subesi „ Types of warranty service Customer Replaceable Unit CRU Service On-site ServiceCourier or Depot Service Customer Carry-In or Mail-In Service Appendix C. Lenovo limited warranty Product Exchange Service Appendix D. Customer replaceable units CRUs Appendix E. Notices „ Export classification notice Appendix E. Notices Windows XP WindowsWindows Vista Wireless related information „ Wireless interoperability „ Safety information related to Mobile Broadband „ Usage environment and your health Electronic emissions notices „ Federal Communications Commission FCC Statement „ 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 „ Japan Compliance Statement for Power line Harmonics „ Korea Class BWeee and recycling statements „ General recycling statement EU Weee statements „ Disposing of a Lenovo Computer Components Appendix E. Notices Factory preinstalled Wireless LAN/WiMAX module Appendix F. Lenovo regulatory noticeLenovo regulatory notice „ Read first regulatory information II. Preinstalled integrated Bluetooth module Appendix F. Lenovo regulatory notice Factory preinstalled Wireless LAN modules II Preinstalled integrated Bluetooth module„ Canada Industry Canada IC IC Certification number Modules de réseaux local sans fil pré-installé à l’usine II Module Bluetooth intégré préinstalléIV Exposure of humans to RF fields RSS-102 Numéro d’homologation IC „ Electronic emission notices Federal Communications Commission FCC Statement Tested To Comply With FCC Standards „ Europe EU Declaration of Conformity Appendix 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 „ Notice for users in in Croatia For model BCM943225HM For model BCM94313HMG2L For model AR5B93 For model AR5B95 For model BCM92046MDGEN „ Notice for users in Brazil BCM94313HMG2L „ 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 India „ Notice for users in Indonesia „ Notice for users in Malaysia „ Notice for users in the Philippines „ Notice for users in Singapore For model BCM94313HMG2L For model AR5B95 „ Notice for users in Thailand „ Notice for users in Taiwan 100 BCM94313HMG2L, AR5B95, AR5B93, BCM943225HM, BCM92046MDGEN „ Notice for users in South Africa Appendix G. Features and specifications Trademarks Index 105 106 Do not Return IT to the Store New World. New Thinking.TM