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Lenovo U455 manual Replacing memory

Models: U455

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Chapter 6. Upgrading and replacing devices

Replacing memory ------------------------------------------------------------------

You can increase the amount of memory in your computer by installing a double data rate (DDR2) small outline dual inline memory module (SDRAM)-available as an option-in the memory slot of your computer. SDRAMs are available in various capacities.

Note: Use only the memory types supported by your computer. If you incorrectly install optional memory, or install an unsupported memory type, a warning beep will sound when you try to start the computer.

To install an SDRAM, do the following:

1Touch a metal table or a grounded metal object to reduce any static electricity in your body, which could damage the SDRAM. Do not touch the contact edge of the SDRAM.

2Turn off the computer. Disconnect the AC adapter and all cables from the computer.

3Close the computer display, and turn the computer over.

4Remove the battery.

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Lenovo U455 manual Replacing memory

Contents

Lenovo IdeaPad U455 First Edition December Copyright Lenovo Dear user Explanation of hard disk capacity Page Page Contents Appendix F. Features Contents Appendix B. Use and careAppendix C. Lenovo limited 120Important safety information Important safety information„ Read this first IiiImportant safety information Unpack Important safety information Working place Important safety information Correct usage procedures Vii Important safety informationViii Important safety information Service and upgradesGetting to know your computer Getting to know your computer Power buttonIntegrated CameraFingerprint TouchpadReader Adapter jack Left-side viewRight-side view Bottom view Compartment Battery latch Battery packSIM card slot Select models only MemoryInstalling the battery pack „ Connecting to the powerConnecting the computer to an electrical outlet Learning the basics„ Turning on the computer „ Configuring the operating systemLearning the basics Putting your computer into sleep state„ Shutting down your computer „ Checking battery status Using AC adapter and battery„ Charging the battery „ Removing the battery pack „ Handling the battery Left click button Using the touchpadRight click button Pinch zoom „ GesturesTwo-Finger Scrolling RotatingLearning the basics Three-Finger Flick „ Numeric keypad Using the keyboard„ Function key combinations Fn + F1 Fn + EscFn + F2 Fn + F3„ Using memory cards not supplied Connecting external devices„ Inserting a memory card „ Connecting a universal serial bus USB device„ Removing a memory card Enabling Bluetooth communications on your computer „ Connecting a Bluetooth device Select models onlySwitching GPU Select models only Learning the basics Special keys and buttons Learning the basics OneKey Rescue system button Volume buttons ~Indicator System status indicatorsTouchpad indicator „ Attaching a security lock not supplied Securing your computer„ Using passwords „ Using VeriFace„ Fingerprint reader Wired connection Using the InternetUsing the Internet „ Software configuration„ Hardware connection CableWi-Fi Wireless connectionEnabling wireless connection „ Using Wi-Fi/WiMax Select models onlySoftware configuration Hardware connection„ Using Mobile Broadband Select models only Inserting the SIM card Removing the SIM card Using the Internet OneKey Rescue system OneKey Rescue system„ Introduction OneKey Rescue system OneKey Rescue system Frequently Asked Questions TroubleshootingWhere are the recovery discs? TroubleshootingWhat can I do if the backup process fails? Display problems TroubleshootingComputer is on Problems with GPU switchingKeyboard problems Troubleshooting Password problemSleep or hibernation problems Mode immediately after Sound problems Troubleshooting Computer screen problemsHard disk drive problem Troubleshooting Battery problemsStartup problem Other problems Troubleshooting OneKey Rescue system problemsConnected external To replace the battery, do the following Replacing the batteryUpgrading and replacing devices Upgrading 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 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 Appendix B. Use and care information „ Be careful about where and how you workCaring for 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„ Take care in setting passwords „ Data safety„ 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„ What your service provider will do to correct problems „ How to obtain warranty serviceAppendix 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 serviceCourier or Depot Service Appendix C. Lenovo limited warranty On-site ServiceCustomer Carry-In or Mail-In Service Product Exchange Service Appendix D. Customer replaceable units CRUs Appendix D. Customer replaceable units CRUs Appendix E. Notices Appendix E. Notices 100 „ Export classification notice101 Energy Star model informationWindows 102„ Wireless interoperability Wireless related information103 104 „ Usage environment and your health105 „ Safety information related to Mobile Broadband106 „ Federal Communications Commission FCC Statement Electronic emissions notices107 108 „ Industry Canada Class B Emission Compliance Statement„ German Class B Compliance Statement „ Avis de conformité à la réglementation d’Industrie Canada109 110 111 „ European Union Compliance Statement Class B Compliance112 „ Korea Class B „ Japan Compliance Statement for Power line Harmonics113 „ General recycling statement Weee and recycling statements114 115 EU Weee statements116 Japan recycling statements117 „ Disposing of a Lenovo Computer Components118 119 120 Appendix F. Features and SpecificationsModel Name IdeaPad U455 Form Factor121 Appendix F. Features and Specifications PortsOthers 122 Trademarks123 IndexIndex 124125 Page If your product is not working correctly Do not Return IT to the StoreNew World. New Thinking.TM