Lenovo T420 manuals

Lenovo T420 User Manual (178 pages)

Brand: Lenovo | Category: Laptops | Size: 20.70 MB |

English

Table of contents

ThinkPadT420andT420i

1

HardwareMaintenanceManual

1

FourthEdition(November2011)

2

©CopyrightLenovo2011

2

Contents

3

Chapter9.Locations........125

4

AppendixA.Notices.........167

4

Aboutthismanual

5

Chapter1.Safetyinformation

7

Electricalsafety

8

Safetyinspectionguide

9

Groundingrequirements

10

Chapter1.Safetyinformation5

11

.Safetyinformation7

13

Chapter1.Safetyinformation9

15

Chapter1.Safetyinformation11

17

.Safetyinformation13

19

.Safetyinformation15

21

Chapter1.Safetyinformation17

23

.Safetyinformation19

25

.Safetyinformation21

27

StrategyforreplacingFRUs

29

Howtouseerrormessage

30

Productdenition

31

Chapter3.Generalcheckout

33

Whattodorst

34

Checkoutguide

35

LenovoThinkVantageT oolbox

37

FRUtests

39

Powersystemcheckout

40

Checkingtheacpoweradapter

40

Checkingoperationalcharging

40

Checkingthebatterypack

41

Checkingthebackupbattery

41

Voltage(Vdc)

42

Red+2.5to+3.2

42

Passwords

44

Power-onpassword

44

Hard-diskpassword

44

Supervisorpassword

45

Powermanagement

47

Screenblankmode

47

Sleep(standby)mode

47

Hibernationmode

47

Symptom-to-FRUindex

49

Numericerrorcodes

49

Errormessages

51

Beepsymptoms

52

No-beepsymptoms

52

LCD-relatedsymptoms

52

.Relatedserviceinformation47

53

Intermittentproblems

54

Undeterminedproblems

54

Chapter5.Statusindicators

55

.Statusindicators51

57

Chapter6.Fnkeycombinations

59

.Fnkeycombinations55

61

Screwnotices

63

Retainingserialnumbers

64

RetainingtheUUID

65

1010Batterypack

69

1020ExpressCardblankbezel

70

3tocompletelyremoveit

71

Capturescrew(1)

72

1050DIMMslotcover

75

1080Keyboard

79

Installationstepsofkeyboard

80

1.Attachthekeyboardconnector

80

.RemovingandreplacingaFRU75

81

1100Backupbattery

85

.RemovingandreplacingaFRU85

91

.RemovingandreplacingaFRU87

93

1130SmartCard

94

1140Modemdaughtercard(MDC)

96

1150Speakerassembly

97

1160LCDunit

99

StepScrew(quantity)Color

100

Black0.181Nm

100

(1.85kgfcm)

100

Black0.392Nm

101

(4.0kgfcm)

101

1170Fanassembly

103

3tosecuretheCPU

107

.RemovingandreplacingaFRU103

109

1200Magnesiumstructureframe

112

.RemovingandreplacingaFRU107

113

1220mSATAsolidstatedrive

116

.RemovingandreplacingaFRU111

117

2010LCDbezelassembly

118

2020LEDboard

119

2030Integratedcamera

121

2040LCDpanelandLCDcable

123

2050Cameracable

125

.RemovingandreplacingaFRU121

127

.RemovingandreplacingaFRU123

129

Chapter9.Locations

131

Rearview

133

Bottomview

134

Chapter10.Partslist

135

.Partslist131

137

.Partslist133

139

.Partslist135

141

.Partslist137

143

.Partslist139

145

.Partslist141

147

.Partslist143

149

.Partslist145

151

.Partslist147

153

.Partslist149

155

.Partslist151

157

.Partslist153

159

Keyboard

160

.Partslist155

161

Miscellaneousparts

162

.Partslist157

163

Powercords

165

Recoverydiscs

166

Chapter10.Partslist161

167

Chapter10.Partslist163

169

Chapter10.Partslist165

171

Commonservicetools

172

AppendixA.Notices

173

Electronicemissionsnotices

174

Trademarks

175

*0A60007_03*

178

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