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Lenovo 10089/1168/4744 [K410], 10121/90A1 [K450 ES], 10086/3109/4743 [K430] Auto, Cool, User Guide

Models: 10120/90A0 [K450 NON-ES] 10121/90A1 [K450 ES] 10089/1168/4744 [K410] 10086/3109/4743 [K430] 10090/2556/4748 [K415]

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AUTO

AUTO

Auto adjust the system CPU clock frequency and running speed. Toggle the Power Control Switch to the Auto position to enable this mode.

Note:

The numeric values may vary because each model is configured differently.

COOL

The CPU runs at low frequency. The system consumes minimum power. Toggle the Power Control Switch to the Cool position to enable this mode.

18User Guide

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Lenovo 10089/1168/4744 [K410], 10121/90A1 [K450 ES], 10120/90A0 [K450 NON-ES], 10086/3109/4743 [K430] Auto, Cool, User Guide

Contents

31503699 IdeaCentre K4 SeriesUser Guide Important Safety Information Page Using the Rescue System ContentsImportant Safety Information Using WindowsTroubleshooting and Confirming Setup Using the SoftwareHardware Replacement Guide AppendixUser Guide Using the Computer HardwareThis chapter contains the following topics Front view of the chassis IdeaCentre K450 Rear view of the chassis4 User Guide IdeaCentre K410 6 User Guide Use this connector to attach headphones to your Basic connector instructionsUse this connector to attach a microphone to your computer when you want to record sound or if youConnecting your computer The configurations are as followings 5.1 Audio configuration instructionsSound configuration is as follows 7.1 Audio configuration instructionsConnecting the power cord Connecting to the Internet Display connecting instructions when playing Blu-ray DiscsWired keyboard selected models only Hot-swappable hard disk Hot-swappable hard disk selected models onlyUsing the hot-swappable hard disk ComponentsDo not install the operating system on the hot-swappable hard disk Power Control Switch selected models only To display the main screen of the software 18 User Guide AUTOCOOL TURBO 20 User Guide This chapter contains the following topics Using Windows22 User Guide Switching between the main Windows 8 interfacesThe Charms Bar Shutting down the computerWindows Help and Support Switching between appsClosing an app Opening other system programs24 User Guide This chapter contains the following topics Using the Rescue SystemOneKey Recovery Note about the service partitionMethod 2 Manual Installation Driver and Application InstallationMethod 1 Automatic Installation 28 User Guide User Guide Using the SoftwareThis chapter contains the following topic User Guide Service and WarrantyLenovo Support RegistrationUser Guide Troubleshooting and Confirming Setup Troubleshooting and Problem Resolution This chapter contains the following topicTroubleshooting Display Problems Solving ProblemsTroubleshooting Audio Problems 34 User Guide Troubleshooting Software ProblemsTroubleshooting Problems with Optical Drives and Hard Disks Special considerations for troubleshooting Windows 36 User Guide BIOS setup utilityWindows Help and Support Performing Daily Maintenance Tasks 38 User Guide  Removing the front bezel Hardware Replacement GuideThis chapter contains the following topics  Identifying internal componentsOverview Safety information for replacing CRUsTools required Additional information resourcesHandling static-sensitive devices User Guide LocationsIdentifying internal components Hard disk driveLenovo K450 Identifying parts on the system boardLenovo K430 Front panel connector Battery46 User Guide Lenovo K410Lenovo K415 General information Pre-disassembly instructionsReplacing hardware To remove the computer cover Removing the computer coverTo remove the front bezel Removing the front bezelTo replace a memory module Replacing a memory moduleSlots one and two, three and four or one and three Lenovo K415Slot four Slot one or threeTo replace a hard disk drive Replacing a hard disk driveTo replace an optical drive Replacing an optical driveTo replace a graphics card Replacing a graphics card56 User Guide c. Remove the screw that secures the graphics card to the chassisb. Remove the screw that secures the graphics card to the chassis To replace the TV-Tuner card Replacing the TV-Tuner card7. Reattach the computer cover To replace the keyboard Replacing the keyboard and mouseDeclaration AppendixTrademarks Energy Star Statement Enabling ErP compliance mode