Table of Contents
Lenovo 720S User Manual
Displayed below is the user manual for 720S by Lenovo which is a product in the Notebooks category. This manual has pages.
Related Manuals
Read the safety notices and important tips in the
included manuals before using your computer.
Lenovo
ideapad 720S-14IKB
User Guide
Read the safety notices and important tips in the
included manuals before using your computer.
Notes
•Beforeusingtheproduct,besuretoreadLenovoSafetyandGeneralInformation
Guidefirst.
•Thelatestelectroniccomplianceandenvironmentalinformationareavailable
fromtheLenovocomplianceinformationWebsites.
‐Toviewcomplianceinformationgoto:
http://www.lenovo.com/compliance.
‐Todownloadenvironmentalinformationgoto:
http://www.lenovo.com/ecodeclaration.
•SomeinstructionsinthisguidemayassumethatyouareusingWindows®10.
IfyouareusinganotherWindowsoperatingsystem,someoperationsmaybe
slightlydifferent.Ifyouareusingotheroperatingsystems,someoperations
maynotapplytoyou.
•Thefeaturesdescribedinthisguidearecommontomostmodels.Some
featuresmaynotbeavailableonyourcomputeroryourcomputermayinclude
featuresthatarenotdescribedinthisuserguide.
•Theillustrationsinthismanualmaydifferfromtheactualproduct.The
screenshotsofoperatingsystemareforreferenceonly.Pleaserefertotheactual
product.
RegulatoryNotice
•Fordetails,refertoGuides&Manualsathttp://support.lenovo.com.
FirstEdition(January2017)
©CopyrightLenovo2017.
LIMITEDANDRESTRICTEDRIGHTSNOTICE:IfdataorsoftwareisdeliveredpursuanttoaGeneral
ServicesAdministration“GSA”contract,use,reproduction,ordisclosureissubjecttorestrictionsset
forthinContractNo.GS‐35F‐05925.
i
Contents
Chapter 1. Getting to know your computer ......................................... 1
Topview.....................................................................................................................1
Left‐sideview............................................................................................................5
Right‐sideview..........................................................................................................8
Bottomview.............................................................................................................10
Chapter 2. Starting to use Windows 10 .............................................11
Configuringtheoperatingsystemforthe
firsttime....................................................................................................................11
Operatingsysteminterfaces..................................................................................11
Puttingthecomputertosleeporshutting
itdown......................................................................................................................15
Connectingtoawirelessnetwork........................................................................17
GethelpfromWindows.........................................................................................18
Chapter 3. Recovery system ...............................................................19
Chapter 4. Troubleshooting ................................................................ 22
Frequentlyaskedquestions...................................................................................22
Troubleshooting......................................................................................................24
Trademarks ..........................................................................................27
1
Chapter 1. Getting to know your computer
Top view - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Note: Thedashedareasindicatepartsthatarenotvisibleexternally.
Attention:
•Donotopenthedisplaypanelbeyond170degrees.Whenclosingthedisplaypanel,be
carefulnottoleavepensoranyotherobjectsinbetweenthedisplaypanelandthe
keyboard.Otherwise,thedisplaypanelmaybedamaged.
e
b
c
d
a
h
g
f
aIntegrated
camera
Usethecameraforvideocommunication.
bComputer display TheLCDdisplaywithLEDbacklightprovidesbrilliant
visualoutput.
cWireless LAN
antennas
ConnecttoawirelessLANadaptertosendandreceive
wirelessradiosignals.
dVentilation slots Dissipateinternalheat.
Note: Makesurethatnoneoftheventilationslotsareblocked,orelseoverheatingofthe
computermayoccur.
eTouch pad Thetouchpadfunctionsasaconventionalmouse.
Touchpad:Tomovethepointeronthescreen,slideyour
fingertipoverthepadinthedirectioninwhichyouwant
thepointertomove.
Touchpadbuttons:Thefunctionsoftheleft/rightside
correspondtothoseoftheleft/rightmousebuttonona
conventionalmouse.
Note: Youcanenable/disablethetouchpadbypressingF6().
Chapter 1. Getting to know your computer
2
fFingerprint
reader (on select
models)
Registersfingerprintsthatcanbeusedaspasswordsto
secureyourcomputer.
gPower Key Pressthiskeytoturnon/offthecomputer.
Whenthecomputerison,pressandholdthiskeyformore
than1second,thecomputerwillentersleepmode,press
andholditformorethan4seconds,thecomputerwillbe
turnedoff.
hBuilt-in
microphone
Capturesoundwhichcanbeusedforvideoconferencing,
voicenarration,oraudiorecording.
Chapter 1. Getting to know your computer
3
Using the keyboard
Hotkeys
Youcanaccesscertainsystemsettingsquicklybypressingtheappropriate
hotkeys.
Mutes/unmutesthesound. Enables/disablesairplane
mode.
Decreasesthevolume
level. Enables/disablescamera.
Increasesthevolumelevel. Locks/unlockstheLCD
screen.
Enables/disables
microphone.
Enablestheexternal
projectorordanglesthe
externaldisplay.
Refreshespage. Decreasesdisplay
brightness.
Enables/disablesthetouch
pad.
Increasesdisplay
brightness.
Note: IfyouchangedtheHotkeyModefromEnabledtoDisabledintheBIOSsetuputility,
youwillneedtopresstheFnkeyincombinationwiththeappropriatehotkey.
Chapter 1. Getting to know your computer
4
Function key combinations
Throughtheuseofthefunctionkeys,youcanchangeoperationalfeatures
instantly.Tousethisfunction,pressandholdFna;thenpressoneofthe
functionkeysb.
ab
Thefollowingdescribesthefeaturesofeachfunctionkey.
Fn + Space (on select
models):
Adjuststhekeyboardbacklight(onbrighter
off).
Chapter 1. Getting to know your computer
5
Left-side view - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
adefbc
aAC power
adapter jack
ConnectstotheACpoweradapter.
bBattery/Charging
status indicator
AC power
adapter
status
Indicator status Meaning
Disconnected
Off Thecomputerisinsleepmodeorturned
off;Thebatteryhasmorethan20%
charge.
Solidamber Thebatteryhasbetween5%and20%
charge.
Fastblinkingamber Thebatteryhasbetween1%and5%
charge.
Connected
Slowblinkingamber Thebatteryisbeingcharged.When
batterychargereaches20%,theblinking
colorchangestowhite.
Slowblinkingwhite Thebatteryhasbetween20%and80%
chargeandisstillcharging.Whenthe
batteryreaches80%chargethelightwill
stopblinking.
SolidwhiteThebatteryhasmorethan80%charge,
chargingwillcontinueuntilthebattery
isfullycharged.
cUSB 3.0 port ConnectstoUSBdevices.
Note: Fordetails,see“ConnectingUSBdevices”onpage7.
dCombo audio
jack
Connectstoheadsets.
•Thecomboaudiojackdoesnotsupportconventionalmicrophones.
•Therecordingfunctionmaynotbesupportedifthird‐partyheadphonesorheadsetsare
connected,duetodifferentindustrystandards.
eNovo button Whenthecomputerisoff,pressthisbuttontostartthe
Push‐buttonresetortheBIOSsetuputility,ortoenterthe
bootmenu.
fPower status
indicator
Indicator Indicator status Meaning
Power status
indicator
On(solidwhite) Thecomputerispoweredon.
Blinking Thecomputerisinsleepmode.
Off Thecomputerispoweredoff.
Chapter 1. Getting to know your computer
6
Notes:
Chapter 1. Getting to know your computer
7
Connecting USB devices
YoucanconnectaUSBdevicetoyourcomputerbyinsertingitsUSBplug
(TypeA)intotheUSBportonyourcomputer.
ThefirsttimeyouplugaUSBdeviceintoaparticularUSBportonyour
computer,Windowsautomaticallyinstallsadriverforthatdevice.Afterthe
driverhasbeeninstalled,youcandisconnectandreconnectthedevice
withoutperforminganyadditionalsteps.
Note: Typically,Windowsdetectsanewdeviceafterithasbeenconnected,andtheninstalls
thedriverautomatically.However,somedevicesmayrequireyoutoinstallthedriver
beforeconnecting.Checkthedocumentationprovidedbythedevice’smanufacturer
beforeconnectingthedevice.
BeforedisconnectingaUSBstoragedevice,makesureyourcomputerhas
finishedtransferringdatatothatdevice.ClicktheSafelyRemoveHardware
andEjectMediaiconintheWindowsnotificationareatoremovethedevice
beforedisconnecting.
Note: IfyourUSBdeviceusesapowercord,connectthedevicetoapowersourcebefore
connectingit.Otherwise,thedevicemaynotberecognized.
Chapter 1. Getting to know your computer
8
Right-side view - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
abcd
aMemory card slot Insertmemorycards(notsupplied)here.
Note: Fordetails,see“Usingmemorycards(notsupplied)”onpage9.
bType-C port Type‐Cportsupports:
•USB3.0
• Nativedisplayport1.2videooutput
•VGA/HDMIoutputusingType‐CVGA/HDMIadapter
(soldseparately)
cUSB 3.0 port ConnectstoUSBdevices.
•Ifthebatterychargeismorethan20%,theUSBportwitha marksupportschargingof
anexternalUSBdevice,evenwhenthecomputerisnotconnectedtopower.
•Fordetails,see“ConnectingUSBdevices”onpage7.
dHDMI port ConnectstodeviceswithHDMIinputsuchasaTVora
display.
Notes:
Chapter 1. Getting to know your computer
9
Using memory cards (not supplied)
Yourcomputersupportsthefollowingtypesofmemorycards:
•SecureDigital(SD)card
•SecureDigitalHighCapacity(SDHC)card
•SDeXtendedCapacity(SDXC)card
• MultiMediaCard(MMC)
•Insertonlyonecardintheslotatatime.
•ThiscardreaderdoesnotsupportSDIOdevices(e.g.,SDIOBluetooth,etc.).
Inserting a memory card
Insertthememorycarduntilittouchesthebottomoftheslot.
Removing a memory card
Gentlypullthememorycardoutofthememorycardslot.
Note: Beforeremovingthememorycard,disableitbyusingtheWindowssafelyremove
hardwareandejectmediautilitytoavoiddatacorruption.
Notes:
Chapter 1. Getting to know your computer
10
Bottom view - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
a bb
aVentilation slots Dissipateinternalheat.
Note: Makesurethatnoneoftheventilationslotsareblocked,orelseoverheatingofthe
computermayoccur.
bSpeakers Provideaudiooutput.
11
Chapter 2. Starting to use Windows 10
Configuring the operating system for the
first time - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Youmayneedtoconfiguretheoperatingsystemwhenitisfirstused.The
configurationprocessmayincludetheproceduresbelow:
• Acceptingtheenduserlicenseagreement
•ConfiguringtheInternetconnection
•Registeringtheoperatingsystem
• Creatingauseraccount
Operating system interfaces - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
The return of the Start menu
Windows10comeswithapowerfulandusefulstartmenu.Toopenthestart
menu,dooneofthefollowing:
• SelecttheStartbuttoninthelower‐leftcorner,theStartmenuisdisplayed.
•PresstheWindowskeyonthekeyboard.
Chapter 2. Starting to use Windows 10
12
ThepowerbuttonisontheStartmenu,clickityoucanchoosetoshutdown
orrestartthecomputer,orputthecomputerintosleepmode.
ThroughtheStartmenu,youcanlocatealltheinstalledappsorviewthe
frequentlyusedapps.
Chapter 2. Starting to use Windows 10
13
The ACTION CENTER
SelecttheACTIONCENTERicon onthetaskbarandtheACTION
CENTERisdisplayed.
FromtheACTIONCENTER,youcanexamineimportantnotificationsfrom
Windowsandyourapps.Moreover,youcanchangecommonsettings
quickly.
Task View in taskbar
InWindows10,youcanaddanewdesktopandswitchbetweendifferent
desktops.
Toaddanewdesktop,dothefollowing:
• ClicktheTaskViewicon inthetaskbararea.
Chapter 2. Starting to use Windows 10
14
•ClickNewdesktop.
Toswitchbetweendesktops,clicktheTaskViewicon,thenselectyour
desireddesktop.
Chapter 2. Starting to use Windows 10
15
Putting the computer to sleep or shutting
it down - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Whenyouhavefinishedworkingwithyourcomputer,youcanputittosleep
orshutitdown.
Putting your computer to sleep
Ifyouwillbeawayfromyourcomputerforonlyashorttime,putthe
computertosleep.
Whenthecomputerisinsleepmode,youcanquicklywakeittoresumeuse,
bypassingthestartupprocess.
Toputthecomputertosleep,dooneofthefollowing:
•Closethedisplaylid.
•PressandholdthePowerkeyforabout1to4seconds.
•Movethecursortothelower‐leftcorner,andthenselecttheStartbutton.
SelectPower Sleep.
Note: Putyourcomputertosleepbeforeyoumoveit.Movingyourcomputerwhilethehard
diskdriveisspinningcandamagetheharddisk,causinglossofdata.
Towakeupthecomputer,performthefollowing:
•Pressanykeyonthekeyboard.
Chapter 2. Starting to use Windows 10
16
Shutting down the computer
Ifyouarenotgoingtouseyourcomputerforalongtime,shutitdown.
Toshutdownyourcomputer,dooneofthefollowing:
•Movethecursortothelower‐leftcorner,andthenselecttheStartbutton.
SelectPower Shutdown.
•Right‐clicktheStartbuttoninthelower‐leftcornerandselectShutdownor
signoutShutdown.
Chapter 2. Starting to use Windows 10
17
Connecting to a wireless network - - - - - - - - - - - - - - - - - - - - - - - - - - -
Enabling wireless connection
Toenablewirelessfunctions,dooneofthefollowing:
• ClicktheACTIONCENTERiconinthenotificationarea,andthen
deselectAirplanemode.
•Presstodisableairplanemode.
• ClickSettings Network&InternetAirplanemodetoopenthe
networkconfigurationpage.ThentoggletheairplanemodeswitchtoOff.
Connecting to a wireless network
Afterwirelesshasbeenenabled,thecomputerwillautomaticallyscanfor
availablewirelessnetworksanddisplaytheminthewirelessnetworklist.To
connecttoawirelessnetwork,clickthenetworknameinthelist,andthen
clickConnect.
Note: Somenetworksrequireanetworksecuritykeyorpassphraseforconnection.To
connecttooneofthosenetworks,askthenetworkadministratorortheInternetservice
provider(ISP)forthesecuritykeyorpassphrase.
Chapter 2. Starting to use Windows 10
18
Get help from Windows - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Ifyouhaveaproblemwiththeoperatingsystem,seetheWindowsGet
Startedapp.Toopenit,dothefollowing:
•Movethecursortothelower‐leftcorner,andthenselecttheStartbutton.
SelectGetStartedfromAllapps.
19
Chapter 3. Recovery system
Introduction
Push‐buttonresetisabuilt‐inrecoverytoolthatenablesuserstorestore
theiroperatingsystemtoitsoriginalstate.Thispreservestheirdataand
importantcustomizations,withouttheneedtobackuptheirdatainadvance.
ThefollowingPush‐buttonresetfeaturesareavailabletousersfrom
multiplelocationswithinWindows:
Refreshing the computer
Fixessoftwareproblemsbyreinstallingthefactorydefaultconfiguration.
Thispreservestheuser’sdata,importantsettings,andanyWindowsStore
appspreviouslypurchasedfromtheWindowsStore.
Resetting the computer
Preparesthecomputerforrecyclingortransferofownership.Thisreinstalls
thefactorydefaultconfigurationandreturnsalluserdataandapplicationsto
thestateoftheiroriginalOut‐of‐BoxExperience(OOBE).
Using Push-button reset
Push‐buttonresetcanbelaunchedusingoneofthefollowingmethods:
•Novobutton:
‐Shutdownthecomputerandwaitatleastfiveseconds.PresstheNovo
buttonandthenselectSystemRecovery.
• Settings:
‐SettingsUpdate&securityRecoveryAdvancedstartupselect
Restartnow.
Formoreinstructions,seetheWindowsHelpandSupportfileonyour
computer.
WhenIpurchasedmycomputer,itincludedacopyofWindows.HowcanI
determinewhetherthecopyofWindowsispreinstalledbyLenovo?
Ontheoutsideofthesalespackageofyourcomputer,youshouldfinda
labelcontainingconfigurationinformationforyourcomputer.Checkthe
printedstringnexttoOS.IfitcontainsWindowsorWIN,thecopyof
WindowswaspreinstalledbyLenovo.
WhatistheRecoveryPartition?
IfyourcomputerispreinstalledwithanyversionofWindows10,the
storagedeviceofyourcomputercontainsaRecoveryPartition.This
Chapter 3. Recovery system
20
partitioncontainstheimagefileofthepreinstalledWindowsoperating
system.Incasesofsystemfailure,youcanusetheLenovoOneKey
RecoverysystemortheWindowsResetfeaturetorestoretheoperating
systemtoitsfactorystatus.
Note: TheRecoveryPartitionisnotassignedadriveletterandcannotbeaccessedthrough
WindowsFileExplorer.
Iuninstalledapreinstalledsoftware,butthereisnosignificantincreaseinthe
freedrivespace.
ThecopyofWindowsrunningonyourcomputermaybeCompact
technologyenabled.ForcomputerswithCompacttechnologyenabled
Windows,themajorityoffilesneededforpreinstalledsoftwareare
installedontheRecoveryPartitionandwon’tbedeletedthroughnormal
uninstallation.
WhathappensifIattempttodeleteormodifytheRecoveryPartition?
Attention:DonotdeleteormodifytheRecoveryPartitiononaCompact
technologyenabledcomputer.
IftheRecoveryPartitionisdeletedormodified,youmaynotbeableto
restoreWindowstothefactorystatus.Forcomputermodelsonwhich
Compacttechnologyisenabled,deletingtheRecoveryPartitionmaycause
Windowstofailtostart.
HowcanIdeterminewhethertheWindowsrunningonmycomputeris
Compacttechnologyenabled?
CompacttechnologyisnormallyenabledoncopiesofWindows10Update
runningonSSD(oreMMC)‐onlycomputermodels.Tocheckyour
computer,
1Right‐clicktheStartbuttoninthelower‐leftcornerandselectDisk
Management.
2TheDiskManagementprogramstarts.
Chapter 3. Recovery system
21
IfWimBootislabeledontheWindowspartition(asillustrated),Compact
technologyisenabledonyourcopyofWindows.
WherecanIfinddriversforthevarioushardwaredevicesofmycomputer?
IfyourcomputerispreinstalledwithaWindowsoperatingsystem,first
checktheinstallationprogramontheCpartitionofyourharddisk.Ifyou
cannotfindthedriversforallthehardwaredevicesthatyouneedthere,
downloadthedriversfromtheLenovoconsumersupportwebsite.
Note: TheLenovosupportWebsitecontainsthelatestdrivers.
22
Chapter 4. Troubleshooting
Frequently asked questions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Thissectionlistsfrequentlyaskedquestionsbycategory.
Finding information
WhatsafetyprecautionsshouldIfollowwhenusingmycomputer?
TheLenovoSafetyandGeneralInformationGuidewhichcamewithyour
computercontainssafetyprecautionsforusingyourcomputer.Readand
followalltheprecautionswhenusingyourcomputer.
WherecanIfindthehardwarespecificationsformycomputer?
Youcanfindhardwarespecificationforyourcomputerontheprinted
flyerswhichcamewithyourcomputer.
WherecanIfindwarrantyinformation?
Forthewarrantyapplicabletoyourcomputer,includingthewarranty
periodandtypeofwarrantyservice,seetheLenovolimitedwarrantyflyer
thatcamewithyourcomputer.
Drivers and preinstalled software
WherearetheinstallationdiscsforLenovopreinstalledsoftware(desktop
software)?
YourcomputerdoesnotcomewithinstallationdiscsforLenovo
preinstalledsoftware.Ifyouneedtoreinstallanypreinstalledsoftware,
youcanfindtheinstallationprogramontheDpartitionofyourharddisk
(forselectmodels,ontheCpartition).Ifyoucannotfindtheinstallation
programthere,youcanalsodownloaditfromtheLenovoconsumer
supportwebsite.
WherecanIfinddriversforthevarioushardwaredevicesofmycomputer?
IfyourcomputerispreinstalledwithaWindowsoperatingsystem,Lenovo
providesdriversforallthehardwaredevicesthatyouneedontheD
partitionofyourharddisk(forselectmodels,ontheCpartition).Youcan
alsodownloadthelatestdevicedriversfromtheLenovoconsumersupport
website.
Chapter 4. Troubleshooting
23
BIOS setup utility
WhatistheBIOSsetuputility?
TheBIOSsetuputilityisROM‐basedsoftware.Itdisplaysbasiccomputer
informationandprovidesoptionsforsettingbootdevices,security,
hardwaremode,andotherpreferences.
HowcanIstarttheBIOSsetuputility?
TostarttheBIOSsetuputility:
1Shutdownthecomputer.
2PresstheNovobuttonandthenselectBIOSSetup.
HowcanIchangethebootmode?
Therearetwobootmodes:UEFIandLegacySupport.Tochangetheboot
mode,starttheBIOSsetuputilityandsetbootmodetoUEFIorLegacy
Supportonthebootmenu.
WhendoIneedtochangethebootmode?
ThedefaultbootmodeforyourcomputerisUEFImode.Ifyouneedto
installalegacyoperatingsystem,suchasWindows,LinuxorDos,etc(that
is,anyoperatingsystembeforeWindows8)onyourcomputer,youmust
changethebootmodetoLegacySupport.Thelegacyoperatingsystem,
suchasWindows,LinuxorDos,etccannotbeinstalledifyoudonʹtchange
thebootmode.
Getting help
HowcanIcontactthecustomersupportcenter?
See“Chapter3.Gettinghelpandservice”ofLenovoSafetyandGeneral
InformationGuide.
Chapter 4. Troubleshooting
24
Troubleshooting - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Display problems
When I turn on the
computer, nothing appears
on the screen.
•Ifthescreenisblank,makesurethat:
‐TheACpoweradapterisconnectedtothe
computer,andthepowercordispluggedintoa
workingelectricaloutlet.
‐Thecomputerpowerison.PressthePowerkey
againforconfirmation.
•Iftheseitemsaresetcorrectly,andthescreenremains
blank,havethecomputerserviced.
When I turn on the
computer, only a white
cursor appears on a blank
screen.
•Restorebacked‐upfilestoyourWindows
environmentortheentirecontentsofyourharddisk
toitsoriginalfactorycontentsusingthePush‐button
reset.Ifyoustillseeonlythecursoronthescreen,
havethecomputerserviced.
The screen goes blank
while the computer is on.
•Yourpowermanagementisenabled.Performthe
followingtoresumefromsleepmode:
‐Pressanykeyonthekeyboard.
Sleep problems
The critical low-battery
error message appears,
and the computer
immediately turns off.
•Thebatterypowerisgettinglow.ConnecttheAC
poweradaptertothecomputer.
The computer enters sleep
mode immediately after
Power-on.
•Makesurethat:
‐Thebatteryischarged.
‐Theoperatingtemperatureiswithintheacceptable
range.See“Chapter2.UseandcareInformation”in
theLenovoSafetyandGeneralInformationGuide.
Note: Ifthebatteryischargedandthetemperatureiswithinrange,havethecomputer
serviced.
The computer does not
return from sleep mode and
the computer does not
work.
•Ifyourcomputerisinsleepmode,connecttheAC
poweradaptertothecomputer,thenpressthe
WindowsbuttonorthePowerkey.
•Ifthesystemstilldoesnotreturnfromsleepmode,
yoursystemhasstoppedresponding,andyoucannot
turnoffthecomputer;resetthecomputer.Unsaved
datamaybelost.Toresetthecomputer,pressand
holdthePowerkeyforeightsecondsormore.Ifthe
computerstilldoesnotreset,removetheACpower
adapter.
Display panel problems
The screen is blank. •Dothefollowing:
‐IfyouareusingtheACpoweradapterorthe
battery,andthebatterystatusindicatorison,press
F12()tomakethescreenbrighter.
‐Ifthepowerindicatorisblinking,pressthePower
keytoresumefromsleepmode.
‐Iftheproblempersists,followthesolutioninthe
nextproblem“Thescreenisunreadableor
distorted.”
The screen is unreadable or
distorted.
•Makesurethat:
‐Thescreenresolutionandcolorqualityarecorrectly
set.
‐Themonitortypeiscorrect.
Incorrect characters appear
on the screen.
•Istheoperatingsystemorprogramsinstalled
correctly?Iftheyareinstalledandconfigured
correctly,havethecomputerserviced.
Sound problems
No sound can be heard
from the speakers even
when the volume is turned
up.
•Makesurethat:
‐TheMutefunctionisoff.
‐Thecomboaudiojackisnotbeingused.
‐Speakersareselectedastheplaybackdevice.
Chapter 4. Troubleshooting
25
Battery problems
Your computer shuts down
before the battery status
indicator shows empty.
-or-
Your computer operates
after the battery status
indicator shows empty.
•Rechargethebattery.
Other problems
Your computer does not
respond.
•Toturnoffyourcomputer,pressandholdthePower
keyforeightsecondsormore.Ifthecomputerstill
doesnotrespond,removetheACpoweradapter.
•Yourcomputermightlockwhenitenterssleepmode
duringacommunicationoperation.Disablethesleep
timerwhenyouareworkingonthenetwork.
The connected external
device does not work.
•Donotconnectordisconnectanyexternaldevice
cablesotherthanUSBwhilethecomputerpoweris
on.Otherwise,youmightdamageyourcomputer.
•Whenusinghighpowerconsumptionexternal
devices,suchasanexternalUSBopticaldrive,usean
externaldevicepoweradapter.Otherwise,thedevice
maynotberecognized,orthesystemmayshutdown
asaresult.
Chapter 4. Troubleshooting
26
27
Trademarks
ThefollowingtermsaretrademarksorregisteredtrademarksofLenovointhe
UnitedStates,othercountries,orboth.
Lenovo
MicrosoftandWindowsaretrademarksofMicrosoftCorporationintheUnited
States,othercountries,orboth.
Othercompany,products,orservicenamesmaybetrademarksorservicemarks
ofothers.
en-US
Rev. RB01
©Lenovo China 2017