Lenovo ThinkPad T520 Hardware Maintenance Manual

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Contents

ContentsAbout this manual. . . . . . . . . . . iiiChapter1.Safety information. . . . . . 1General safety . . . . . . . . . . . . . . . . 1Electrical safety . . . . . . . . . . . . . . . 2Safety inspection guide . . . . . . . . . . . . 3Handling devices that are sensitive to electrostaticdischarge. . . . . . . . . . . . . . . . . . 3Grounding requirements . . . . . . . . . . . . 4Safety notices (multilingual translations). . . . . . 4Laser compliance statements (multilingualtranslations). . . . . . . . . . . . . . . . 17Chapter2.Important serviceinformation . . . . . . . . . . . . . . 25Strategy for replacing FRUs . . . . . . . . . 25Strategy for replacing a hard disk drive . . . 25Important notice for replacing a systemboard . . . . . . . . . . . . . . . . 26How to use error codes . . . . . . . . . 26Strategy for replacing FRUs for CTO, CMV, andGAV . . . . . . . . . . . . . . . . . . . 26Product definition. . . . . . . . . . . . 26FRU identification for CTO, CMV, and GAVproducts . . . . . . . . . . . . . . . 27Chapter3.General checkout . . . . . 29What to do first . . . . . . . . . . . . . . 29Checkout guide . . . . . . . . . . . . . . 31System supporting the Lenovo ThinkVantageToolbox program and the PC-Doctor for DOSdiagnostics program . . . . . . . . . . 31System supporting the Lenovo diagnosticsprograms . . . . . . . . . . . . . . . 35Power system checkout . . . . . . . . . . . 37Checking the ac power adapter . . . . . . 37Checking operational charging . . . . . . 38Checking the battery pack . . . . . . . . 38Checking the backup battery . . . . . . . 39Chapter4.Related serviceinformation . . . . . . . . . . . . . . 41Restoring the factory contents by using RecoveryDisc Set . . . . . . . . . . . . . . . . . 41Passwords . . . . . . . . . . . . . . . . 42Power-on password. . . . . . . . . . . 42Hard-disk password. . . . . . . . . . . 42Supervisor password . . . . . . . . . . 43How to remove the power-on password . . . 43How to remove the hard-disk password . . . 43Power management . . . . . . . . . . . . 44Screen blank mode . . . . . . . . . . . 44Sleep (standby) mode . . . . . . . . . . 44Hibernation mode . . . . . . . . . . . 45Symptom-to-FRU index . . . . . . . . . . . 45Numeric error codes . . . . . . . . . . 46Error messages . . . . . . . . . . . . 47Beep symptoms . . . . . . . . . . . . 48No-beep symptoms . . . . . . . . . . . 49LCD-related symptoms . . . . . . . . . 49Intermittent problems . . . . . . . . . . 49Undetermined problems . . . . . . . . . 50Chapter5.Installing and configuringRAID. . . . . . . . . . . . . . . . . . 51Supported RAID levels . . . . . . . . . . . 51Configuring the system UEFI BIOS to enableembedded SATA RAID functionality . . . . . . 51Creating RAID volumes . . . . . . . . . . . 52Deleting RAID volumes . . . . . . . . . . . 52Chapter6.Status indicators . . . . . 53Chapter7.Fn key combinations . . . 57Chapter8.FRU replacementnotices . . . . . . . . . . . . . . . . 61Screw notices . . . . . . . . . . . . . . . 61Retaining serial numbers. . . . . . . . . . . 62Restoring the serial number of the systemunit . . . . . . . . . . . . . . . . . 62Retaining the UUID . . . . . . . . . . . 63Reading or writing the ECA information . . . 63Chapter9.Removing and replacing aFRU . . . . . . . . . . . . . . . . . . 65Before servicing ThinkPad T520, T520i, andW520 . . . . . . . . . . . . . . . . . . 661010 Battery pack . . . . . . . . . . . . . 661020 Serial Ultrabay Enhanced device or travelbezel . . . . . . . . . . . . . . . . . . 671030 DIMM slot cover. . . . . . . . . . . . 681040 DIMM (bottom slot). . . . . . . . . . . 691050 Hard disk drive slot cover, hard disk drive(HDD) and HDD rubber rails or solid state drive(SSD) and storage converter . . . . . . . . . 711060 Keyboard . . . . . . . . . . . . . . 721070 DIMM (upper slot) . . . . . . . . . . . 76© Copyright Lenovo 2011, 2012 i