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Replacingthepowersupplyassembly
Attention:
Donotopenyourcomputerorattemptanyrepairbeforereadingandunderstandingthe“Importantsafetyinformation”
intheUserGuide.ToobtainacopyoftheUserGuide,goto:
http://www.lenovo.com/ThinkCentreUserGuides
Thissectionprovidesinstructionsonhowtoreplacethepowersupplyassembly.
Althoughtherearenomovingpartsinyourcomputerafterthepowercordhasbeendisconnected,the
followingwarningsarerequiredforyoursafetyandproperUnderwritersLaboratories(UL)certification.
DANGER
Hazardousmovingparts.Keepfingersandotherbodypartsaway.
DANGER
Neverremovethecoveronapowersupplyoranypartthathasthefollowinglabelattached.
Hazardousvoltage,current,andenergylevelsarepresentinsideanycomponentthathasthislabel
attached.Therearenoserviceablepartsinsidethesecomponents.Ifyoususpectaproblemwith
oneoftheseparts,contactaservicetechnician.
Toreplacethepowersupplyassembly,dothefollowing:
1.Turnoffthecomputeranddisconnectallpowercordsfromelectricaloutlets.
2.Removethecomputercover.See“Removingthecomputercover”onpage70.
3.Disconnectthepowersupplyassemblycablesfromalldrivesandfromthe24-pinpowerconnectorand
4-pinpowerconnectoronthesystemboard.See“Locatingpartsonthesystemboard”onpage67
.
4.Laythecomputeronitssideandremovethefourscrewsattherearofthechassisthatsecurethe
powersupplyassembly.
Figure21.Removingthescrewsforthepowersupplyassembly
82LenovoH520eHardwareMaintenanceManual
- MachineTypes:90AM 1
- FirstEdition(January2013) 2
- Contents 3
- Chapter10.FRUlists.........93 4
- Chapter11.Additionalservice 4
- AppendixA.Notices.........101 4
- Index.................103 4
- Chapter1.Aboutthismanual 5
- Chapter2.Safetyinformation 7
- Voltage-selectionswitch 9
- Safetyinspectionguide 9
- Groundingrequirements 10
- Chapter2.Safetyinformation7 11
- .Safetyinformation9 13
- Chapter2.Safetyinformation11 15
- .Safetyinformation13 17
- .Safetyinformation15 19
- Chapter2.Safetyinformation17 21
- ≥18kg≥32kg≥55kg 23
- .Safetyinformation21 25
- Chapter2.Safetyinformation25 29
- Chapter3.Generalinformation 33
- LenovoSupportWebsite 34
- Chapter4.Generalcheckout 35
- Basictroubleshooting 37
- Troubleshootingprocedure 38
- Troubleshooting 39
- Audioproblems 39
- NoaudioinWindows 40
- CDproblems 41
- DVDproblems 42
- Intermittentproblems 43
- Harddiskdriveproblems 43
- Monitorproblems 46
- Networkingproblems 47
- AwirelessLANproblem 49
- AwirelessWANproblem 49
- Optionproblems 50
- Performanceandlockupproblems 51
- Printerproblems 53
- Serialportproblems 53
- Softwareproblems 54
- USBproblems 55
- Diagnostics 55
- LenovoSolutionCenter 55
- Viewingandchangingsettings 57
- Usingpasswords 57
- Passwordconsiderations 58
- Power-OnPassword 58
- AdministratorPassword 58
- HardDiskPassword 58
- Enablingordisablingadevice 59
- Selectingastartupdevice 59
- EnablingErPcompliancemode 60
- ExitingtheSetupUtilityprogram 61
- Chapter7.Symptom-to-FRUindex 63
- POSTerrorcodes 64
- .Symptom-to-FRUindex61 65
- Miscellaneouserrormessages 66
- Undeterminedproblems 67
- Chapter8.Locations 69
- LocatingmajorFRUsandCRUs 70
- Locatingpartsonthesystemboard 71
- Locatinginternaldrives 71
- Figure5.Drivebaylocations 72
- Chapter9.ReplacingFRUs 73
- Removingthecomputercover 74
- Attention: 75
- Figure7.Removingthefrontbezel 75
- InstallingorreplacingaPCIcard 76
- .ReplacingFRUs73 77
- Figure10.RemovingaPCIcard 78
- Replacingthebattery 79
- .ReplacingFRUs77 81
- Replacingtheopticaldrive 82
- .ReplacingFRUs79 83
- Chapter9.ReplacingFRUs81 85
- Replacingthemicroprocessor 87
- 2onthemicroprocessor 88
- Replacingthesystemboard 89
- Completingthepartsreplacement 94
- Chapter9.ReplacingFRUs91 95
- Chapter10.FRUlists 97
- .FRUlists95 99
- ©CopyrightLenovo2013 101
- Powermanagement 104
- AutomaticPower-onfeatures 104
- AppendixA.Notices 105
- Televisionoutputnotice 106
- EuropeanconformanceCEmark 106
- Trademarks 106
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