User's Manual

Aboutthismanual

ThismanualcontainsserviceandreferenceinformationforthefollowingThinkPad®products.

ThinkPadT520andT520i

MT4239,4240,4241,4242,4243,4244,and4246

ThinkPadW520

MT4249,4260,4270,4276,4281,4282,and4284

Usethismanualalongwiththeadvanceddiagnosticteststotroubleshootproblems.

Important:ThismanualisintendedonlyfortrainedservicetechnicianswhoarefamiliarwithThinkPad

products.Usethismanualalongwiththeadvanceddiagnosticteststotroubleshootproblemseffectively.

BeforeservicingaThinkPadproduct,besuretoreadalltheinformationunderSafetyinformationand

Importantserviceinformation.