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Lenovo U350 manual Troubleshooting Keyboard problems, Sleep or hibernation problems

Models: U350

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Page 57

Chapter 5. Troubleshooting

Keyboard problems

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

Sleep or hibernation problems

The computer enters sleep	• If the processor overheats, the computer automatically
mode unexpectedly.	enters sleep mode to allow the computer to cool and to
	protect the processor and other internal components.
	Check the settings for sleep mode.
The computer enters sleep	• Make sure that:
mode immediately after	- The battery is charged.
Power-on self-test (POST).	- The operating temperature is within the acceptable
	range. See “Appendix B. Use and care
	information” on page 64.

Note: If the battery is charged and the temperature is within range, have the computer serviced.

The critical low-battery error	• The battery power is getting low. Connect the AC
message appears, and the	adapter to the computer, or replace the battery with
computer immediately turns	a fully charged one.
off.

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Lenovo U350 manual Troubleshooting Keyboard problems, Sleep or hibernation problems

Contents

Lenovo IdeaPad U350 First Edition May Copyright Lenovo 2009. All rights reserved Respective Users Explanation of hard disk capacity Page Page Contents Appendix F. Features Contents Appendix B. Use and careAppendix C. Lenovo limited 117Important safety information Important safety information„ Read this first IiiImportant safety information Unpack Important safety information Working place Important safety information On using Vii Important safety informationViii Important safety information Service and upgradesGetting to know your computer Power button Getting to know your computerMute button Ambient Light Sensor Touchpad Wireless module antennas Computer displayLeft-side view Right-side view Bottom view Getting to know your computer Speakers Battery packInstall the battery pack „ Connect to the powerLearning the basics „ Read the manuals„ Turn on the computer „ Configure the operating systemLearning the basics Putting your computer into sleep state„ Shutting down your computer Using AC adapter and battery „ Checking battery status„ Charging the battery „ Removing the battery pack „ Handling the battery Using the touchpad Left click buttonRight click button „ Numeric keypad Using the keyboard„ Function key combinations Fn + F1 Fn + EscFn + F2 Fn + F3Special keys and buttons Mute button Learning the basics OneKey Rescue System buttonTouchpad indicator System status indicators„ Attaching a security lock not supplied Securing your computer„ Using passwords „ Using VeriFace„ Using memory cards not supplied Connecting external devices„ Removing a memory card „ Inserting a memory card„ Connecting a universal serial bus USB device „ Connecting a Bluetooth device specific models onlyEnabling Bluetooth communications Page Wired connection Using the InternetUsing the Internet „ Software configuration„ Hardware connection CableWi-Fi Wireless connectionEnabling wireless connection „ Using Wi-Fi/WiMax specific models onlySoftware configuration Hardware connection„ Using Mobile Broadband specific models only Inserting the SIM card Removing the SIM card Using the Internet OneKey Rescue System OneKey Rescue System„ Introduction OneKey Rescue System „ Using Lenovo OneKey Recovery in WindowsOneKey Rescue System Frequently Asked Questions TroubleshootingWhere are the recovery discs? TroubleshootingWhat can I do if the backup process fails? Display problems TroubleshootingComputer is on Password problemSleep or hibernation problems Troubleshooting Keyboard problemsComputer does not return from sleep mode and does not work Sound problems Troubleshooting Computer screen problemsTroubleshooting Battery problems Hard disk drive problemStartup problem Made Troubleshooting OneKey Rescue System problemsRespond Troubleshooting Other problemsUpgrading and replacing devices Replacing the batteryUpgrading and replacing devices Handling a hard disk drive Replacing the hard disk driveUpgrading and replacing devices Upgrading and replacing devices Upgrading and replacing devices Replacing memory Upgrading and replacing devices Upgrading and replacing devices Upgrading and replacing devices Appendix A. Getting help and service Getting help on the Web Appendix A. Getting help and serviceAppendix A. Getting help and service Appendix A. Getting help and service Getting help around the world „ Be careful about where and how you work Appendix B. Use and care informationCaring your computer Appendix B. Use and care information „ Notice of static-electricity„ Carry your computer properly „ Be gentle with your computer„ Handle storage media and drives properly „ For outdoor use„ Data safety „ Take care in setting passwords„ Other important tips Appendix B. Use and care information „ Ergonomic information Accessibility and comfort„ Questions about vision? „ What if you are traveling?„ General tips for maintenance MaintenanceAppendix B. Use and care information „ 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 Information „ Replacement of a product or part „ Use of personal information „ Your additional responsibilities„ What this warranty does not cover „ Limitation of liability „ Dispute resolution „ European Economic Area EEA „ Other rightsLenovo Technology B.V. Turkiye Istanbul Subesi „ Lenovo Turkey addressWarranty information Customer Replaceable Unit CRU Service „ Types of warranty serviceAppendix C. Lenovo limited warranty On-site Service Courier or Depot ServiceCustomer Carry-In or Mail-In Service Product Exchange Service SMS Warranty Service Telephone NumbersToll Free Number Outside of Sao Paulo Region Appendix D. Customer replaceable units CRUs Appendix D. Customer replaceable units CRUs Appendix E. Notices Appendix E. Notices „ Export classification notice Energy Star model information Windows Vista Windows XP100 „ Wireless interoperability101 „ Usage environment and your health102 „ Safety information related to Mobile Broadband103 Electronic emissions notices „ Federal Communications Commission FCC Statement104 105 „ Industry Canada Class B Emission Compliance Statement„ Avis de conformité à la réglementation d’Industrie Canada „ German Class B Compliance Statement106 107 108 „ European Union Compliance Statement Class B Compliance109 „ Japan Compliance Statement for Power line Harmonics „ Korea Class B110 Weee and recycling statements „ General recycling statement111 112 EU Weee statements113 Japan recycling statements114 „ Disposing of a Lenovo Computer Components115 116 117 Appendix F. Features and SpecificationsModel Name IdeaPad U350 Form Factor118 Appendix F. Features and Specifications Ports119 Trademarks120 IndexIndex 121122 If your product is not working correctly Do not Return IT to the StoreNew World. New Thinking.TM