User's Manual

SymptomAction
Theoperatingsystemdoesnot
start.
Verifythat:
•Thestartupsequenceincludesthedevicewheretheoperatingsystemresides.
Usually,theoperatingsystemisontheharddiskdrive.Formoreinformation,
see“Selectingastartupdevice”onpage78
.
Note:ForSMCcomputers,youmightreceivetheerrormessage“Nooperating
systemfound.PressF1torepeatbootsequence.”Inthiscase,press
Ctrl+Alt+DeleteinsteadofF1toestablishaconnectiontothestorageareanetwork
whereyouroperatingsystemisstored.Verifythattheusernameisnotlogged
oninanotherlocation.
TheSMCloginprompt
disappearsbeforeyoulog
onandthenablackscreen
displays(forSMCcomputers
only).
Verifythatyourcomputerdoesnotturnoffduetoinactivity.SMCwillautomatically
turnoffaninactivecomputer.Ifyourcomputerturnsoffautomatically,turnonthe
computerandlogon.Contactyouradministratorifyoucannotcorrecttheproblem.
Thecomputerbeepsmultiple
timesbeforetheoperating
systemstarts.
Verifythatnokeysarestuck.
Troubleshootingprocedure
Usethefollowingprocedureasastartingpointfordiagnosingproblemsyouareexperiencingwithyour
computer:
1.Verifythatthecablesforallattacheddevicesareconnectedcorrectlyandsecurely.
2.Verifythatallattacheddevicesthatrequireacpowerareconnectedtoproperlygrounded,functioning
electricaloutlets.
3.VerifythatallattacheddevicesareenabledintheBIOSsettingsofyourcomputer.Formoreinformation
aboutaccessingandchangingtheBIOSsettings,refertoyourChapter7“UsingtheSetupUtility
program”onpage75.
4.Gotothe“Troubleshooting”onpage91andfollowtheinstructionsforthetypeofproblemyouare
experiencing.IftheTroubleshootinginformationdoesnothelpyouresolveaproblem,continuewiththe
nextstep.
5.Tryusingapreviouslycapturedcongurationtoseeifarecentchangetohardwareorsoftwaresettings
hascausedaproblem.Beforerestoringapreviousconguration,Captureyourcurrentcongurationin
casetheoldercongurationsettingsdonotsolvetheproblemorhaveadverseaffects.Torestorea
capturedconguration,dothefollowing:
•OntheWindowsVistaoperatingsystem,clickStart➙ControlPanel➙SystemandMaintenance
➙System➙SystemProtection➙SystemRestore.
•OntheWindows7operatingsystem,clickStart➙ControlPanel➙SystemandSecurity➙
System➙SystemProtection➙SystemRestore.
Ifthisdoesnotcorrecttheproblem,continuewiththenextstep.
6.Runthediagnosticprograms.See“Diagnosticprograms”onpage107formoreinformation.
•Ifthediagnosticprogramsdetectahardwarefailure,contacttheLenovoCustomerSupportCenter.
SeeChapter11“Gettinginformation,help,andservice”onpage109
formoreinformation.
•Ifyouareunabletorunthediagnosticprograms,contacttheLenovoCustomerSupportCenter.See
Chapter11“Gettinginformation,help,andservice”onpage109formoreinformation.
•Ifthediagnosticprogramsdonotdetectahardwarefailure,continuewiththenextstep.
7.Useanantivirusprogramtoseeifyourcomputerhasbeeninfectedbyavirus.Iftheprogramdetectsa
virus,removethevirus.
90ThinkCentreUserGuide