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3.Levels1and2Support
Toupdate(ash)theBIOS,see“Updating(ashing)BIOSfromadisc”onpage560.
Updating(ashing)BIOSfromadisc
Thissectionprovidesinstructionsonhowtoupdate(ash)BIOSfromadisc.SystemBIOSprogramupdates
areavailableat:
http://www.lenovo.com/support
Toupdate(ash)BIOSfromadisc:
1.Makesuretheopticaldriveyouwanttouseissetastherstbootdeviceinthestartupdevicesequence.
See“Selectingastartupdevice”onpage45.
2.Makesurethecomputeristurnedon.Then,insertthesystemprogramupdate(ash)discintothe
opticaldrive.
3.Turnthecomputeroffandbackonagain.Theupdatebegins.
4.Whenpromptedtochangetheserialnumber,pressY.
5.TypeinthetwentycharacterserialnumberofyourcomputerandthenpressEnter.
6.Whenpromptedtochangethemachinetype/model,pressY.
7.Typeinthetwentycharactermachinetype/modelofyourcomputerandthenpressEnter.
8.Followtheinstructionsonthescreentocompletetheupdate.
RecoveringfromaPOST/BIOSupdatefailure
IfthepowertoyourcomputerisinterruptedwhilePOST/BIOSisbeingupdated(ashupdate),yourcomputer
mightnotrestartcorrectly.Ifthishappens,performthefollowingprocedurewhichiscommonlycalled
Boot-blockRecovery.
1.Turnoffthecomputerandanyattacheddevices,suchasprinters,monitors,andexternaldrives.
2.Unplugallpowercordsfromelectricaloutlets,andremoveoropenthecomputercover.See“Removing
thecomputercover”onpage73or“Openingthecomputercover”onpage107.
3.Dependingonyourmachinetype,youmightneedtolaythecomputeronitssideforeasieraccessto
thesystemboardoryoumightneedtopivottheopticaldrivebayassemblyupwardandorremove
theharddiskdrivetoaccessthesystemboard,seeAccessingthesystemboardcomponentsand
drives”onpage108.
4.LocatetheClearCMOS/Recoveryjumperonthesystemboard.See“Locatingpartsonthesystem
board”onpage76or“Locatingpartsonthesystemboard”onpage110.
5.RemoveanycablesthatimpedeaccesstotheClearCMOS/Recoveryjumper.
6.Movethejumperfromthestandardposition(pin1andpin2)topin2andpin3.
7.Reconnectanycablesthatweredisconnected.
8.Reinstallorclosethecomputercoverandreconnectthepowercordsforthecomputerandmonitor
toelectricaloutlets.See“CompletingtheFRUreplacement”onpage103
or“CompletingtheFRU
replacement”onpage131
.
9.Turnonthecomputerandthemonitor,andtheninsertthePOST/BIOSupdate(ashupdate)disc
intotheopticaldrive.
10.Turnthecomputeroffandbackonagain.
11.Therecoverysessionwilltaketwotothreeminutes.Duringthistimeyouwillhearaseriesofbeeps.After
theupdatesessioniscompleted,therewillbenovideo,theseriesofbeepswillend,andthesystemwill
automaticallyturnoff.Removethediscfromtheopticaldrivebeforethesystemcompletelyturnsoff.
12.Repeatsteps2through5.
560ThinkCentreHardwareMaintenanceManual
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