ThinkPad T420 - Checkout Guide

Chapter2.Importantserviceinformation
Thischapterpresentsfollowingimportantserviceinformationthatappliestoallmachinetypessupportedby
thismanual:
•“StrategyforreplacingFRUs”onpage23
–“Strategyforreplacingaharddiskdrive”onpage23
–“Importantnoticeforreplacingasystemboard”onpage24
–“Howtouseerrormessage”onpage24
•“StrategyforreplacingFRUsforCTO,CMV,andGAV”onpage25
–“Productdenition”onpage25
–“FRUidenticationforCTO,CMV,andGAVproducts”onpage25
Important:
AdvisecustomerstocontacttheLenovoCustomerSupportCenteriftheyneedanyassistanceinobtainingor
installinganysoftwarexes,drivers,andUEFIBIOSdownloads.TelephonenumbersforLenovoSupportare
availableathttp://www.lenovo.com/support.
SystemDisassembly/ReassemblyvideosthatshowtheFRUremovalsorreplacementsfortheLenovo
®
authorized
servicetechniciansareavailableinthefollowingsupportsite:
http://www.lenovoservicetraining.com/ion/
StrategyforreplacingFRUs
Beforereplacingparts:
Makesurethatallsoftwarexes,drivers,andUEFIBIOSdownloadsareinstalledbeforereplacingany
FRUslistedinthismanual.
Afterasystemboardisreplaced,ensurethatthelatestUEFIBIOSisloadedtothesystemboardbefore
completingtheserviceaction.
Todownloadsoftwarexes,drivers,andUEFIBIOS,gotohttp://www.lenovo.com/supportandclick
DownloadDrivers&Software.Thenfollowtheinstructionsonthescreentoinstallthenecessarysoftware.
UsethefollowingstrategytopreventunnecessaryexpenseforreplacingandservicingFRUs:
•IfyouareinstructedtoreplaceaFRUbutthereplacementdoesnotcorrecttheproblem,reinstall
theoriginalFRUbeforeyoucontinue.
•Somecomputershavebothaprocessorboardandasystemboard.Ifyouareinstructedtoreplaceeither
theprocessorboardorthesystemboard,andreplacingoneofthemdoesnotcorrecttheproblem,
reinstallthatboard,andthenreplacetheotherone.
•IfanadapteroradeviceconsistsofmorethanoneFRU,anyoftheFRUsmaybethecauseoftheerror.
Beforereplacingtheadapterordevice,removetheFRUs,onebyone,toseeifthesymptomschange.
ReplaceonlytheFRUthatchangedthesymptoms.
Attention:Thesetupcongurationonthecomputeryouareservicingmayhavebeencustomized.Running
AutomaticCongurationmayalterthesettings.Notethecurrentcongurationsettings(usingtheView
Congurationoption);then,whenservicehasbeencompleted,verifythatthosesettingsremainineffect.
Strategyforreplacingaharddiskdrive
Alwaystrytorunalow-levelformatbeforereplacingaharddiskdrive.Thiswillcauseallcustomerdataon
theharddisktobelost.Besurethatthecustomerhasacurrentbackupofthedatabeforedoingthistask.
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