1.Makesuretheopticaldriveyouwanttouseissetastherstbootdeviceinthestartupdevicesequence.
See“Viewingorchangingthestartupdevicesequence”onpage41.
2.Makesurethecomputeristurnedonandinsertthediscintotheopticaldrive.Theupdatebegins.
Note:Youcaninsertthediscintotheopticaldrivewhenyouaresettingthestartupdevicesequence.
However,ifyouinsertthediscintotheopticaldrivewhenyouhavealreadyenter edtheoperating
system,youneedtorestartthecomput ertobegintheupdateprocess.
3.Whenpromptedtochangetheserialnumber,pressN.Ifyouwanttochangetheserialnumber,pressY
whenprompted.Then,typeintheserialnumberandpressEnter.
4.Whenpromptedtochangethemachinetype/model,pressN.Ifyouwanttochangethemachine
type/model,pressYwhenprompted.Then,typeinthemachinetype/modelandpressEnter.
5.Followtheinstructionsonthescreent ocompletetheupdate.
Updating(ashing)BIOSfromyouroperatingsystem
Note:BecauseLenovomakesconstantimprovementstotheWebsite,theWebpagecontentsaresubject
tochangewithoutnotice,includingthecontentsreferencedinthefollowingprocedure.
Toupdate(ash)BIOSfromyouroperatingsystem:
1.Gotohttp://www.lenovo.com/support.
2.Dothefollowingtolocatethedownloadablelesforyourmachinetype:
a.IntheEnteraproductnumbereld,typeyourmachinetypeandclickGo.
b.ClickDownloadsanddrivers.
c.SelectBIOSintheReneresultseldtoeasilylocatealltheBIOSrelatedlinks.
d.ClicktheBIOSupdatelink.
e.ClicktheTXTlethatcontainstheinstructionsforupdating(ashing)BIOSfromyouroperating
system.
3.Printtheseinstructions.Thisisveryimportantbecausetheyarenotonthescreenafterthedownload
begins.
4.Followtheprintedinstructionstodownload,extract,andinstalltheupdate.
RecoveringfromaPOS T/BIOSupdatefailure
Ifthepowertoyourcomputerisinterrupt edwhilePOST/BIOSisbeingupdat ed(ashupdate),yourcomputer
mightnotrestartcorrectly.Ifthishappens,performthefollowingprocedurewhichiscommonlycalled
Boot-blockRecovery.
1.Turnoffthecomput erandanyattacheddevices,suchasprinters,monitors,andexternaldrives.
2.Unplugallpowercordsfromelectricaloutlets,andremovethecomputercover.See“Removingthe
computercover”onpage68.
3.Accessthesystemboard.
4.LocatetheClearCMOS/Recoveryjumperonthesystemboard.See“Locatingpartsonthesystem
board”onpage70.
5.RemoveanycablesthatmightpreventyouraccesstotheClearCMOS/Recoveryjumper.
6.Movethejumperfromthestandardposition(pin1andpin2)topin2andpin3.
7.Reconnectanycablesthatweredisconnected.See“CompletingtheFRUreplacement”onpage97.
8.Reinstallthecomputercoverandreconnectthepowercordsforthecomputerandmonitortoelectrical
outlets.
204ThinkCentreHardwareMaintenanceManual