SymptomAction
Theoperatingsystemdoesnot
start.
Verifythat:
•Thestartupsequenceincludesthedevicewheretheoperatingsystemresides.
Usually,theoperatingsystemisontheharddiskdrive.F ormoreinformation,
see“Selectingastartupdevice”onpage51.
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.
Verifythatnokeysar estuck.
Diagnosticprogr ams
Diagnosticprogramsareusedtotesthardwarecomponentsofyourcomputerandreport
operating-system-controlledsettingsthatcancausehardwarefailures.Therearetwoprogramspreinstalled
onyourcomputertohelpyoudiagnosecomputerproblems:
•LenovoThinkVantageToolbox(usedwhenyouarerunningtheWindowsoperatingsystem)
•PC-DoctorforRescueandRecovery(usedwhenyourWindowsoperatingsystemdoesnotstart)
Notes:
1.YoucanalsodownloadthePC-DoctorforDOSdiagnosticprogramfromhttp://www.lenovo.com/support.
See“PC-DoctorforDOS”onpage57fordetailedinformation.
2.Ifyouareunabletoisolateandrepairtheproblemyourselfafterrunningthediagnosticprograms,save
andprinttheloglescreatedbythediagnosticprograms.Youwillneedthelogleswhenyouspeaktoa
Lenovotechnicalsupportrepresentative.
LenovoThinkVantageT oolbox
TheLenovoThinkVantageToolboxprogramhelpsyoumaintainyourcomput er,improvecomputingsecurity,
diagnosecomputerproblems,getfamiliarwiththeinnovativetechnologiesprovidedbyLenovo,andget
moreinformationaboutyourcomputer.Y oucanusethediagnosticsfeatureoftheLenovoThinkVantage
Toolboxprogramt otestdevices,diagnosecomputerproblems,createbootablediagnosticmedia,updat e
systemdrivers,andviewsysteminformation.
•ToruntheLenovoThinkVantageToolboxprogramontheWindows7operatingsystem,clickStart➙All
Programs➙LenovoThinkVantageTools➙SystemHealthandDiagnostics.Followtheinstructions
onthescreen.
•ToruntheLenovoThinkVantageToolboxprogramontheWindowsVistaoperatingsystem,clickStart➙
AllPrograms➙ThinkVantage➙LenovoThinkVantageToolbox.Followtheinstructionsonthescreen.
Followtheinstructionsonthescr een.Foradditionalinformation,refertotheL enovoThinkVantageToolbox
helpsystem.
56ThinkCentreUserGuide