Lenovo THINKCENTRE 2491 Uživatelský manuál stáhnout pdf (Strana 99)

5.RemovethescrewthatsecuresthefrontaudioandUSBassemblybrackettothechassis.

Figure29.RemovingthescrewthatsecuresthefrontaudioandUSBassemblytothechassis

6.LocatethepowerswitchassemblybesidethefrontaudioandUSBassembly.Removethepowerswitch

assemblybyreleasingtab1andtab2thatsecurethepowerswitchassemblytothechassis.

Figure30.Removingthepowerswitchassembly

Chapter8.ReplacingFRUs93

1 2 ... 94 95 96 97 98 99 100 101 102 103 104 ... 193 194

ThinkCentre 1
HardwareMaintenanceManual 1
“Safetyinformation”onpage3 4
Contents 5
Chapter10.Additionalservice 6
AppendixA.Notices.........183 6
Index.................185 6
Chapter1.Aboutthismanual 7
Chapter2.Safetyinformation 9
Voltage-selectionswitch 11
Safetyinspectionguide 11
Groundingrequirements 12
Chapter2.Safetyinformation7 13
.Safetyinformation9 15
Chapter2.Safetyinformation11 17
.Safetyinformation13 19
.Safetyinformation15 21
Chapter2.Safetyinformation17 23
Chapter2.Safetyinformation19 25
.Safetyinformation21 27
Chapter2.Safetyinformation23 29
.Safetyinformation25 31
Chapter2.Safetyinformation27 33
Chapter3.Generalinformation 35
Specications 37
Chapter4.Generalcheckout 39
Problemdeterminationtips 40
Chapter4.Generalcheckout35 41
Chapter5.Diagnostics 43
Runningtests 44
Testresults 45
QuickandFullerase-harddrive 45
Viewingthetestlog 46
Viewingandchangingsettings 47
Usingpasswords 47
Passwordconsiderations 48
Power-OnPassword 48
AdministratorPassword 48
HardDiskPassword 48
Enablingordisablingadevice 49
Selectingastartupdevice 50
Smartperformancechoices 50
Chapter7.Symptom-to-FRUindex 53
.Symptom-to-FRUindex49 55
.Symptom-to-FRUindex51 57
.Symptom-to-FRUindex53 59
.Symptom-to-FRUindex55 61
.Symptom-to-FRUindex57 63
.Symptom-to-FRUindex59 65
.Symptom-to-FRUindex61 67
Beepsymptoms 69
POSTerrorcodes 69
Miscellaneouserrormessages 71
Undeterminedproblems 72
Chapter8.ReplacingFRUs 75
Locatingcomponents 77
Locatingpartsonthesystemboard 77
Openingthecomputercover 78
Figure6.Removingthefrontbezel 80
Chapter8.ReplacingFRUs75 81
Figure10.RemovingthePCIcard 82
Replacingtheharddiskdrive 83
Replacingtheopticaldrive 84
Chapter8.ReplacingFRUs79 85
Replacingthebattery 86
Replacingtheheatsink 87
Replacingthemicroprocessor 88
Chapter8.ReplacingFRUs83 89
2onthemicroprocessor 91
Chapter8.ReplacingFRUs85 91
Replacingthesystemboard 92
2ofthemicroprocessorsocket 93
Chapter8.ReplacingFRUs87 93
Replacingthesystemfanassembly 94
Chapter8.ReplacingFRUs89 95
Replacingtheinternalspeaker 97
.ReplacingFRUs93 99
Replacingtheacpoweradapter 100
Attention: 101
Chapter8.ReplacingFRUs97 103
Completingthepartsreplacement 104
Chapter9.FRUlists 105
.FRUlists101 107
.FRUlists103 109
.FRUlists105 111
.FRUlists107 113
MechanicalFRUs 114
.FRUlists109 115
.FRUlists111 117
KeyboardandMouse 119
.FRUlists115 121
.FRUlists117 123
.FRUlists119 125
.FRUlists121 127
.FRUlists123 129
.FRUlists125 131
.FRUlists127 133
.FRUlists129 135
.FRUlists131 137
.FRUlists133 139
.FRUlists135 141
.FRUlists137 143
.FRUlists139 145
.FRUlists141 147
.FRUlists143 149
.FRUlists145 151
AdaptersandmiscellaneousFRUs 153
PowerCords 155
.FRUlists151 157
.FRUlists153 159
.FRUlists155 161
Recoverydiscs 162
.FRUlists157 163
.FRUlists159 165
.FRUlists161 167
Windows7HomeBasic32RecoveryCD 168
.FRUlists163 169
.FRUlists165 171
.FRUlists167 173
.FRUlists169 175
.FRUlists171 177
.FRUlists173 179
.FRUlists175 181
.FRUlists177 183
Powermanagement 187
AutomaticPower-Onfeatures 187
AppendixA.Notices 189
Televisionoutputnotice 190
Trademarks 190
*0A74394* 194

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