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Lenovo 10090/2556/4748 [K415], 10121/90A1 [K450 ES], 10120/90A0 [K450 NON-ES] manual Turbo

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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TURBO

Note:

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

TURBO

The CPU runs at full speed. The system achieves its optimal performance. Toggle the Power Control Switch to the Turbo position to enable this mode.

Note:

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

User Guide 19

Image 24

Lenovo 10090/2556/4748 [K415], 10121/90A1 [K450 ES], 10120/90A0 [K450 NON-ES], 10086/3109/4743 [K430] manual Turbo

Contents

IdeaCentre K4 Series User Guide31503699 Important Safety Information Page Contents Important Safety InformationUsing Windows Using the Rescue SystemUsing the Software Hardware Replacement GuideAppendix Troubleshooting and Confirming SetupUsing the Computer Hardware This chapter contains the following topicsUser Guide Front view of the chassis Rear view of the chassis IdeaCentre K4504 User Guide IdeaCentre K410 6 User Guide Basic connector instructions Use this connector to attach a microphone to yourcomputer when you want to record sound or if you Use this connector to attach headphones to yourConnecting your computer 5.1 Audio configuration instructions The configurations are as followings7.1 Audio configuration instructions Sound configuration is as followsConnecting the power cord Display connecting instructions when playing Blu-ray Discs Connecting to the InternetWired keyboard selected models only Hot-swappable hard disk selected models only Using the hot-swappable hard diskComponents Hot-swappable hard diskDo 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 AUTO COOL18 User Guide TURBO 20 User Guide Using Windows This chapter contains the following topicsSwitching between the main Windows 8 interfaces The Charms BarShutting down the computer 22 User GuideSwitching between apps Closing an appOpening other system programs Windows Help and Support24 User Guide Using the Rescue System This chapter contains the following topicsNote about the service partition OneKey RecoveryDriver and Application Installation Method 1 Automatic InstallationMethod 2 Manual Installation 28 User Guide Using the Software This chapter contains the following topicUser Guide Service and Warranty Lenovo SupportRegistration User GuideTroubleshooting and Confirming Setup  Troubleshooting and Problem ResolutionThis chapter contains the following topic User GuideSolving Problems Troubleshooting Display ProblemsTroubleshooting Audio Problems Troubleshooting Software Problems Troubleshooting Problems with Optical Drives and Hard Disks34 User Guide Special considerations for troubleshooting Windows BIOS setup utility Windows Help and Support36 User Guide Performing Daily Maintenance Tasks 38 User Guide Hardware Replacement Guide This chapter contains the following topics Identifying internal components  Removing the front bezelSafety information for replacing CRUs OverviewAdditional information resources Tools requiredHandling static-sensitive devices Locations Identifying internal componentsHard disk drive User GuideIdentifying parts on the system board Lenovo K450Front panel connector Battery Lenovo K430Lenovo K410 46 User GuideLenovo K415 Pre-disassembly instructions Replacing hardwareGeneral information Removing the computer cover To remove the computer coverRemoving the front bezel To remove the front bezelReplacing a memory module To replace a memory moduleLenovo K415 Slot fourSlot one or three Slots one and two, three and four or one and threeReplacing a hard disk drive To replace a hard disk driveReplacing an optical drive To replace an optical driveReplacing a graphics card To replace a graphics cardc. Remove the screw that secures the graphics card to the chassis 56 User Guideb. Remove the screw that secures the graphics card to the chassis Replacing the TV-Tuner card To replace the TV-Tuner card7. Reattach the computer cover Replacing the keyboard and mouse To replace the keyboardAppendix DeclarationTrademarks Energy Star Statement Enabling ErP compliance mode