Lenovo 33472YU, S230U manual Special keys, Special key Description

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Chapter 6. Special keys

The following table describes the functions of the special keys on the computer keyboard.

Table 8. Special keys

Special key	Description
Esc	Press this key to open the ThinkPad Keyboard Properties window where you can toggle the
	F1-F12 key functionality.
F1	Press this key to mute or unmute the speakers.
	Note: If you mute the sound and turn off your computer, the sound will remain muted when
	you turn on your computer again. To turn on the sound, press F2 or F3.
F2	Press this key to decrease the speaker volume.
F3	Press this key to increase the speaker volume.
F4	Press this key to mute or unmute all of the recording devices.
F5	You can temporarily change the computer display brightness by pressing these two keys.
	To change the default brightness level, right-click the battery status icon in the Windows
	notification area, then click Adjust screen brightness and make changes as desired.
F6
F7	Press this key to switch the display output location between the computer display and an
	external monitor.
F8	Press this key to enable or disable the Airplane mode.
	The Airplane mode disables the wireless features of your computer to comply with airline
	regulations. When you press this key, a list of wireless connections is displayed. You can
	quickly turn on or turn off all the wireless network connections.
F9	Press this key to open the Settings charm.
F10	Press this key to open the Search charm.

© Copyright Lenovo 2012

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Contents ThinkPad S230u Hardware Maintenance ManualFirst Edition September Copyright Lenovo Contents Appendix A. Notices Iii About this manualIv Hardware Maintenance Manual General safety Safety informationElectrical safety Safety inspection guide Grounding requirements Safety notices multilingual translationsSafety information Hardware Maintenance Manual Safety information Perigo Perigo Vorsicht Vorsicht Vorsicht Safety information Hardware Maintenance Manual Safety information Hardware Maintenance Manual Safety information Hardware Maintenance Manual Safety information Hardware Maintenance Manual Before replacing parts Important service informationStrategy for replacing FRUs Select Drivers & SoftwareDynamic Configure To Order CTO How to use error messageImportant notice for replacing a system board Click Warranty & Services Click Check Warranty Status Using PEWFRU identification for CTO, CMV, and GAV products Custom Model Variant CMVClick Product & Parts Detail Click Parts & AccessoriesWhat to do first General checkoutFollowing are not covered under warranty Lenovo Solution CenterCheckout guide Quick test programsBootable diagnostic programs Uefi diagnostic programTests Tools Checking the ac power adapter Power system checkoutClick Lenovo Bootable Diagnostics Checking the backup battery Checking the battery packWire Voltage V dc Checking operational chargingHardware Maintenance Manual Restoring the factory contents by using Recovery Disc Set Related service informationRefreshing the computer Power-on password PasswordsHard-disk password How to remove the power-on password Supervisor passwordHow to remove the hard-disk password Select Power-On PasswordSleep mode Power managementHibernation mode Select Master HDPSymptom-to-FRU index Wireless off modeNumeric error codes 0190 Charge the battery pack Symptom or error FRU or action, in sequence 01890191 Run the ThinkPad Setup program, and then save 0199 Run the ThinkPad Setup program, and then saveNo-beep symptoms Error messagesBeep symptoms Intermittent problems LCD-related symptomsUndetermined problems Reseat the LCD connectorsHardware Maintenance Manual Indicator Meaning Status indicatorsIndicator Meaning Special key Description Special keysSpecial key Description Locations Locating computer controls, connectors, and indicatorsFront view Bottom view Rear viewLocating FRUs and CRUs CRU statement for customers Major FRUs and CRUs Description Self-service CRU Optional-serviceCRU LCD FRUs Hinge Button board Looking up FRU informationHardware Maintenance Manual Screw notices FRU replacement noticesPlastic to plastic Logic card to plasticRestoring the serial number of the system unit Retaining serial numbersMTM on rear label Reading or writing the ECA information Retaining the UuidProduct ID on rear label Hardware Maintenance Manual General guidelines Removing or replacing a FRUBefore servicing the computer Disabling the built-in batteryRemoving the SIM card Hard disk drive or solid-state driveRemoving or replacing a FRU Removal steps of keyboard KeyboardStep Screw quantity Color Torque Removing or replacing a FRU When installing PCI Express Mini Card for wireless LANRemoval steps of PCI Express Mini Card for wireless LAN Removal steps of PCI Express Mini Card for wireless WAN Removal steps of mSATA solid-state drive Removal steps of keyboard bezel Keyboard bezel, backup battery, and speaker assemblyStep Screw cap Screw quantity Color Torque M2 × 3 mm, wafer-head, nylon-coated Silver 181 Nm Kgf-cm Hardware Maintenance Manual Battery pack Proximity sensors Important notices for replacing a battery packRemoval steps of proximity sensors Removal steps of thermal fan assembly LCD unit Removal steps of LCD unit When installing M2.5 × 3 mm, wafer-head, nylon-coated Silver 181 Nm Kgf-cm Removal steps of DC-in connector DC-in connectorRemoval steps of system board and base cover assembly System board and base cover assemblyImportant notices for handling the system board Applying labels to the base cover Following illustration shows the location of each label LCD panel Button bezelRemoval steps of button bezel Removal steps of LCD panel Button boardRemoval steps of button board Integrated cameraRemoval steps of integrated camera HingeRemoval steps of hinge When installing Removal steps of wireless antenna assembly Removing or replacing a FRU Hardware Maintenance Manual Appendix A. Notices Trademarks Electronic emissions noticesPage 1P0B48943

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