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Lenovo B450 manual Troubleshooting, Display problems

Models: B450

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

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 compu- ter, nothing appears on the screen.

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

•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.

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Lenovo B450 manual Troubleshooting, Display problems

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 Important safety information Important safety information„Read this first Important safety information UnpackDanger Important safety information Working placeDanger DangerImportant safety information On usingDanger DangerDo NOT wrap the power cord around the power adapter or other objects Important safety information Service and upgradesviii Chapter 1. Getting to know your computer b c dTop view Chapter 1. Getting to know your computer Left-sideview Chapter 1. Getting to know your computera b c d e f jackRight-sideview Optical driveUSB ports Reads/Burns optical diskswireless device switchwireless devices on your computer Chapter 1. Getting to know your computerBottom view Battery pack Battery latch - spring loadedChapter 1. Getting to know your computer Fan louversChapter 2. Learning the basics „Connect to the power„Read the manuals „Configure the operating system „Turn on the computerChapter 2. Learning the basics Putting your computer into sleep state„Shutting down your computer Chapter 2. Learning the basicsStart menu Using AC adapter and battery „Checking battery status„Charging the battery „Removing the battery pack „Handling the battery Using the touchpad Chapter 2. Learning the basicsTouchpad Click buttonUsing the keyboard „Numeric keypad„Function key combinations Enter sleep mode Special keys and buttons Chapter 2. Learning the basicsOneKey Rescue System button System status indicators Hard disk drive indicatorWireless communication 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„Connecting a universal serial bus USB device „Inserting a memory card„Removing a memory card Wired connection Chapter 3. Using the Internet„Software configuration Chapter 3. Using the Internet„Hardware connection CableWireless connection Wi-Fi„Using Wi-Fispecific models only Chapter 3. Using the InternetEnabling wireless connection Software configurationOneKey Rescue System Chapter 4. OneKey Rescue System„Introduction Chapter 4. OneKey Rescue System Shut down your computer Chapter 5. Troubleshooting Frequently Asked QuestionsChapter 5. Troubleshooting Where are the recovery discs?Where can I find warranty information? How can I install the device drivers?What can I do if the backup process fails? Troubleshooting Chapter 5. TroubleshootingDisplay problems Chapter 5. Troubleshooting A Password problemChapter 5. Troubleshooting Keyboard problemsSleep or hibernation 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 problemsChapter 5. Troubleshooting Sound problemsBattery problems A hard disk drive problemChapter 5. Troubleshooting A startup problemOneKey Rescue System problems Other problemsDo not connect or disconnect any external device Replacing the battery Chapter 6. Upgrading and replacing devices„To replace the battery Chapter 6. Upgrading and replacing devices Replacing the hard disk drive Chapter 6. Upgrading and replacing devicesHandling a hard disk drive To replace the hard disk drive, do the following 5 Pull the tab in the direction shown by arrow 0Reinstall the compartment cover AReinstall the screws BReinstall the battery packChapter 6. Upgrading and replacing devices 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 Removing the optical drive To remove the optical drive, do the followingRemove the screw shown in the figure 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 worldAppendix B. Use and care information „Be careful about where and how you workCaring for your computer „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„Data safety „Take care in setting passwords„Other important tips 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 EEA„Lenovo Turkey address LENOVO TECHNOLOGY B.V. TURKIYE ISTANBUL SUBESIPosta Kodu Tel Fax Warranty information „Types of warranty service Appendix C. Lenovo limited warranty1 Customer Replaceable Unit “CRU” Service Appendix C. Lenovo limited warranty 2On-siteService3Courier or Depot Service 4Customer Carry-Inor Mail-InServiceAppendix C. Lenovo limited warranty 5Product Exchange ServiceAppendix D. Customer replaceable units CRUs Appendix D. Customer replaceable units CRUs Appendix E. Notices NoticesLenovo United States, Inc 1009 Think Place - Building One Morrisville, NCAppendix E. Notices „Export classification notice Wireless related information „Wireless interoperability„Usage environment and your health „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 „Lenovo Product Service Information „Japanese VCCI Class B StatementAppendix E. Notices „Korea Class B Turkish statement of compliance Türkiye EEE Yönetmeliğine Uygunluk BeyanıWEEE and recycling statements „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 Appendix F. Features and Specifications Model Name Lenovo B450Form Factor SystemAppendix F. Features and Specifications I/O PortsUSB 2.0 x 4 ports RJ-45portTrademarks Index Index Warranty information InteroperabilityIf your product is not working correctly LENOVODO NOT RETURN IT TO THE STORE New World. New Thinking.TM