Lenovo ThinkPad T420 User Manual

Gettinghelpandservice
Ifyouneedhelp,service,technicalassistance,orjustwantmoreinformationaboutLenovoproducts,you
willndawidevarietyofsourcesavailablefromLenovotoassistyou.Thissectioncontainsinformation
aboutwheretogoforadditionalinformationaboutLenovoandourproducts,whattodoifyouexperiencea
problemwithyourcomputer,andwhomtocallforserviceshoulditbenecessary.
Informationaboutyourcomputerandpreinstalledsoftware,ifany,isavailableinthedocumentationthat
comeswithyourcomputer.Thatdocumentationincludesprintedbooks,onlinebooks,READMEles,and
helples.Inaddition,informationaboutLenovoproductsisavailableontheWorldWideWeb.
MicrosoftServicePacksarethelatestsoftwaresourceforWindowsproductupdates.Theyareavailable
viaWebdownload(connectionchargesmayapply)orviadisc.Formorespecicinformationandlinks,go
tohttp://www.microsoft.com.LenovooffersUpandRunningtechnicalassistancewithinstallationof,or
questionsrelatedto,ServicePacksforyourLenovo-preloadedMicrosoftWindowsproduct.Forinformation,
pleasecontactthe“CustomerSupportCenter”onpage236.
Usingdiagnosticprograms
Manycomputerproblemscanbesolvedwithoutoutsideassistance.Ifyouexperienceaproblemwithyour
computer,therstplacetostartisthetroubleshootinginformationofyourcomputerdocumentation.Ifyou
suspectasoftwareproblem,seethedocumentation,includingREADMElesandonlinehelp,thatcomes
withtheoperatingsystemorapplicationprogram.
ThinkPadnotebookscomewithasetofdiagnosticprogramsthatyoucanusetohelpyouidentifyhardware
problems.SeeDiagnosingprogramsforinstructionsonusingthediagnosticprograms.
TheTroubleshootinginformationorthediagnosticprogramsmighttellyouthatyouneedadditionalor
updateddevicedriversorothersoftware.LenovomaintainspagesontheWorldWideWebwhereyoucan
getthelatesttechnicalinformationanddownloaddevicedriversandupdates.
LenovoSupportWebsite
Technicalsupportinformationisavailableat:
http://www.lenovo.com/support
Thisportalisupdatedwiththelatestinformationaboutthefollowingsubjects:
•Downloads&Drivers:Downloaddrivers,ashBIOS,andupdateyoursoftware.
•Warranty:Checkyourwarrantystatusandupgradeyourwarranty.
•TechnicalSupport:ClickNeedHelp?forself-helptipstohelpdiagnoseaproblem.
•ThinkVantage:LearnmoreaboutThinkVantagesoftwaretoimproveproductivityandreducecost.
•LenovoForums:Searchthecommunityknowledgebaseforyourcomputertoshareanddiscover
informationwithotherusers.
•UserGuides&Manuals:Readorprintanypublicationsrelatedtoyourproduct.
CallingLenovo
Ifyouhavetriedtocorrecttheproblemyourselfandstillneedhelp,duringthewarrantyperiod,youcan
gethelpandinformationbytelephonethroughtheCustomerSupportCenter.Thefollowingservicesare
availableduringthewarrantyperiod:
•Problemdetermination-Trainedpersonnelareavailabletoassistyouwithdeterminingifyouhavea
hardwareproblemanddecidingwhatactionisnecessarytoxtheproblem.
236UserGuide

Lenovo ThinkPad T420 Specifications

General

Processor cache	3 MB
Processor front side bus	1333 MHz
Number of processors supported	1
Display diagonal	14 \
Display resolution	1366 x 768 pixels
AC adapter power	65 W
Indication light	Yes
Infrared data port	No
Number of speakers	2
Maximum internal memory	8 GB
Speaker power	1 W
Battery voltage	10.8 V
HDD speed	7200 RPM
HDD capacity	320 GB
HDD interface	SATA

Weight and Dimensions

Depth	337 mm
Height	21.2 mm
Height (imperial)	0.83 \