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Lenovo B450 manual Troubleshooting, Keyboard problems, Sleep or hibernation problems, Fn + Insert

Models: B450

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Keyboard problems

Chapter 5. Troubleshooting

Keyboard problems

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

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 59.

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 B450 manual Troubleshooting, Keyboard problems, Sleep or hibernation problems, Fn + Insert

Contents

Lenovo B450 User GuideFirst Edition July Copyright Lenovo Respective Users Dear userExplanation of hard disk capacity Page Page Contents Notice on deleting data from „Read this first Important safety informationImportant safety information Danger Important safety informationUnpack Danger Important safety informationWorking place DangerDanger Important safety informationOn using DangerDo NOT wrap the power cord around the power adapter or other objects viii Important safety informationService and upgrades Top view Chapter 1. Getting to know your computerb c d Chapter 1. Getting to know your computer a b c d e f Left-sideviewChapter 1. Getting to know your computer jackUSB ports Right-sideviewOptical drive Reads/Burns optical diskswireless devices on your computer wireless deviceswitch Chapter 1. Getting to know your computerBottom view Chapter 1. Getting to know your computer Battery packBattery latch - spring loaded Fan louvers„Read the manuals Chapter 2. Learning the basics„Connect to the power Chapter 2. Learning the basics „Configure the operating system„Turn on the computer Putting your computer into sleep stateStart menu „Shutting down your computerChapter 2. Learning the basics „Charging the battery Using AC adapter and battery„Checking battery status „Removing the battery pack „Handling the battery Touchpad Using the touchpadChapter 2. Learning the basics Click buttonUsing the keyboard „Numeric keypad„Function key combinations Enter sleep mode OneKey Rescue System button Special keys and buttonsChapter 2. Learning the basics Wireless communication indicator System status indicatorsHard disk drive indicator Chapter 2. Learning the basicsSecuring your computer „Attaching a security lock not supplied„Using passwords screen in BIOS setup utilityConnecting external devices „Using memory cards not supplied„Removing a memory card „Connecting a universal serial bus USB device„Inserting a memory card Wired connection Chapter 3. Using the Internet„Hardware connection „Software configurationChapter 3. Using the Internet CableWireless connection Wi-FiEnabling wireless connection „Using Wi-Fispecific models onlyChapter 3. Using the Internet Software configuration„Introduction OneKey Rescue SystemChapter 4. OneKey Rescue System Chapter 4. OneKey Rescue System Shut down your computer Chapter 5. Troubleshooting Frequently Asked QuestionsWhere can I find warranty information? Chapter 5. TroubleshootingWhere are the recovery discs? How can I install the device drivers?What can I do if the backup process fails? Display problems TroubleshootingChapter 5. Troubleshooting Chapter 5. Troubleshooting A Password problemSleep or hibernation problems Chapter 5. TroubleshootingKeyboard problems Fn + InsertIf the computer does not return from sleep mode, it may have entered hibernation mode automatically because the battery is depleted. Check the power indicator Chapter 5. Troubleshooting Computer screen problemsBattery problems Chapter 5. TroubleshootingSound problems A hard disk drive problemOneKey Rescue System problems Chapter 5. TroubleshootingA startup problem Other problemsDo not connect or disconnect any external device „To replace the battery Replacing the batteryChapter 6. Upgrading and replacing devices Chapter 6. Upgrading and replacing devices Handling a hard disk drive Replacing the hard disk driveChapter 6. Upgrading and replacing devices To replace the hard disk drive, do the following 5 Pull the tab in the direction shown by arrow Chapter 6. Upgrading and replacing devices 0Reinstall the compartment coverAReinstall the screws BReinstall the battery pack Replacing memory Chapter 6. Upgrading and replacing devices 6Press outwards on the latches on both edges of the socket at the same time, remove the SO-DIMM.Be sure to save the old SO-DIMMfor future use Page Remove the screw shown in the figure Removing the optical driveTo remove the optical drive, do the following Gently pull the optical drive outSetup Poster Appendix A. Getting help and service Getting help on the Web Calling the customer support centerThe following items are not covered Machine Type and Model Lenovo warranty service telephone numbers Getting help around the worldCaring for your computer Appendix B. Use and care information„Be careful about where and how you work „Notice of static-electricity Appendix B. Use and care information„Be gentle with your computer „Carry your computer properly„For outdoor use „Handle storage media and drives properly„Other important tips „Data safety„Take care in setting passwords Memory module Accessibility and comfort „Ergonomic information„What if you are traveling? „Questions about vision?Maintenance „General tips for maintenanceUpdate device drivers and BIOS when needed „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 Appendix C. Lenovo limited warrantyinformation.” „Replacement of a product or part „Your additional responsibilities „Use of personal information„What this warranty does not cover „Limitation of liability „Dispute resolution „Other rights „European Economic Area EEAPosta Kodu Tel Fax „Lenovo Turkey addressLENOVO TECHNOLOGY B.V. TURKIYE ISTANBUL SUBESI Warranty information 1 Customer Replaceable Unit “CRU” Service „Types of warranty serviceAppendix C. Lenovo limited warranty 3Courier or Depot Service Appendix C. Lenovo limited warranty2On-siteService 4Customer Carry-Inor Mail-InServiceAppendix C. Lenovo limited warranty 5Product Exchange ServiceAppendix D. Customer replaceable units CRUs Appendix D. Customer replaceable units CRUs Lenovo United States, Inc Appendix E. NoticesNotices 1009 Think Place - Building One Morrisville, NCAppendix E. Notices „Export classification notice „Usage environment and your health Wireless related information„Wireless interoperability „Safety information related to Mobile Broadband 3Use of mobile devices on board aircraft is explicitly prohibited by many airlines companies, especially during take-offand landing. The built-inMobile Broadband module on your computer is a low-powerradio transceiver. When it is turned on, it intermittently receives and transmits radio frequency RF energy which could cause interference with the operation of the airplane communication or navigation system. Refer to rules or regulations of your airline company for Mobile Broadband use. Never enable Mobile Broadband feature on your computer unless you are explicitly permitted to do so Electronic emissions notices „Federal Communications Commission FCC StatementResponsible party „German Class B Compliance Statement Deutschland Page Appendix E. Notices „Lenovo Product Service Information„Japanese VCCI Class B Statement „Korea Class B WEEE and recycling statements Turkish statement of complianceTürkiye EEE Yönetmeliğine Uygunluk Beyanı „General recycling statementEU WEEE statements Japan recycling statements „Disposing of a Lenovo Computer Components Notice on deleting data from your hard disk Notice for users in the U.S.AFormat your hard disk, using the software for initializing it Form Factor Appendix F. Features and SpecificationsModel Name Lenovo B450 SystemUSB 2.0 x 4 ports Appendix F. Features and SpecificationsI/O Ports RJ-45portTrademarks Index Index Warranty information InteroperabilityDO NOT RETURN IT TO THE STORE If your product is not working correctlyLENOVO New World. New Thinking.TM