Dell PowerEdge T420 Owner's Manual - Page 6

Internal SD Card

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93

Removing An Internal SD Card

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93

Installing An Internal SD Card

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93

Processors

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94

Removing A Processor

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94

Installing A Processor

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96

Redundant AC Power Supply

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97

Removing A Redundant AC Power Supply

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98

Installing A Redundant AC Power Supply

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99

Removing The Power Supply Blank

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99

Installing The Power Supply Blank

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100

Replacing The Power Supply Divider

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100

Non-Redundant AC Power Supply

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101

Removing A Non-Redundant AC Power Supply

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101

Installing A Non-Redundant AC Power Supply

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103

Power Distribution Board And Power Interposer Board

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103

Removing The Power Interposer Board

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103

Installing The Power Interposer Board

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105

Replacing The Power Distribution Board

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105

System Battery

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105

Replacing The System Battery

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105

Control-Panel Assembly

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106

Removing The Control-Panel Assembly

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107

Installing The Control-Panel Assembly

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110

Removing The Control Panel

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110

Installing The Control Panel

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112

Removing The Control-Panel Board For Systems With LCD Modules

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112

Installing The Control-Panel Board For Systems With LCD Modules

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113

Removing The Control-Panel Board For Systems With Diagnostic Indicators

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114

Installing The Control-Panel Board For Systems With Diagnostic Indicators

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115

Removing The LCD Module

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115

Installing The LCD Module

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116

Removing The VGA Module—Rack Mode

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117

Installing The VGA Module—Rack Mode

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118

System Board

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118

Removing The System Board

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118

Installing The System Board

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119

4 Converting The System From Tower Mode To Rack Mode

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121

Safety Instructions

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121

Preparing A System For Conversion From Tower Mode To Rack Mode

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121

Rack Installation

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123

Section	Page
Contents	3
About Your System	9
Front-Panel Features And Indicators—Tower Mode	9
Front-Panel Features And Indicators—Rack Mode	14
LCD Panel Features	15
Home Screen	16
Setup Menu	16
View Menu	17
Diagnostic Indicators	17
Hard-Drive Indicator Patterns	19
Back-Panel Features And Indicators	20
NIC Indicator Codes	22
Power Indicator Codes For Redundant Power Supply	22
Power Indicator Codes For Non-Redundant Power Supply	23
Other Information You May Need	24
Using The System Setup And Boot Manager	25
Choosing The System Boot Mode	25
Entering System Setup	26
Responding To Error Messages	26
Using The System Setup Navigation Keys	26
System Setup Options	26
System Setup Main Screen	27
System BIOS Screen	27
System Information Screen	27
Memory Settings Screen	28
Processor Settings Screen	28
SATA Settings Screen	29
Boot Settings Screen	30
Integrated Devices Screen	30
Serial Communications Screen	31
System Profile Settings Screen	32
System Security Screen	33
Miscellaneous Settings	34
System And Setup Password Features	34
Assigning A System And/Or Setup Password	34
Deleting Or Changing An Existing System And/Or Setup Password	35
Using Your System Password To Secure Your System	36
Operating With A Setup Password Enabled	36
Entering The UEFI Boot Manager	36
Using The Boot Manager Navigation Keys	37
Boot Manager Screen	37
UEFI Boot Menu	38
Embedded System Management	38
iDRAC Settings Utility	38
Entering The iDRAC Settings Utility	38
Installing System Components	39
Recommended Tools	39
Front Bezel (Optional)	39
Installing The Front Bezel	39
Removing The Front Bezel	40
System Feet—Tower Mode	40
Removing The System Feet	40
Installing The System Feet	41
Wheel Assembly (Optional)—Tower Mode	41
Removing The Wheel Assembly	42
Installing The Wheel Assembly	43
Opening And Closing The System	43
Opening The System	43
Closing The System	44
Inside The System	44
Optical Drives And Tape Drives (Optional)	46
Removing The Optical Drive Or Tape Drive	47
Installing The Optical Drive Or Tape Drive	50
Cooling Shroud	50
Removing The Cooling Shroud	50
Installing The Cooling Shroud	51
Hard Drives—Hot-Swappable	52
Removing A Hot-Swap Hard Drive	52
Installing A Hot-Swap Hard Drive	53
Removing A 2.5 Inch Hard-Drive Blank	54
Installing A 2.5 Inch Hard-Drive Blank	54
Removing A 3.5 Inch Hard-Drive Blank	54
Installing A 3.5 Inch Hard-Drive Blank	55
Removing A 2.5 Inch Hard Drive From A 3.5 Inch Hard-Drive Adapter	55
Installing A 2.5 Inch Hard Drive Into A 3.5 Inch Hard-Drive Adapter	56
Removing A Hard Drive Or A Hard-Drive Adapter From A Hard-Drive Carrier	56
Installing A Hard Drive Or A Hard-Drive Adapter Into A Hard-Drive Carrier	57
Hard Drives—Cabled	57
Removing The Internal Hard-Drive Bay	58
Installing The Internal Hard-Drive Bay	59
Removing A Cabled Hard Drive	59
Installing A Cabled Hard Drive	60
Hard-Drive Backplane	61
Removing The Hard-Drive Backplane	61
Installing The Hard-Drive Backplane	67
Four-Slot Hard-Drive Blank	68
Removing A Four-Slot Hard-Drive Blank	68
Installing A Four-Slot Hard-Drive Blank	69
System Memory	69
General Memory Module Installation Guidelines	71
Mode-Specific Guidelines	72
Advanced ECC (Lockstep)	72
Memory Optimized (Independent Channel) Mode	72
Memory Sparing	72
Memory Mirroring	73
Sample Memory Configurations	73
Removing Memory Modules	74
Installing Memory Modules	75
Cooling Fans	76
Removing The Internal Cooling Fan	76
Installing The Internal Cooling Fan	78
Removing The External Cooling Fan	79
Installing The External Cooling Fan	81
Internal USB Memory Key (Optional)	81
Replacing The Internal USB Key	81
PCIe Card Holder (Optional)	83
Removing The PCIe Card Holder	83
Installing The PCIe Card Holder	84
Expansion Cards	84
Expansion Card Installation Guidelines	84
GPU Card Installation Guidelines	85
Removing An Expansion Card	85
Installing An Expansion Card	86
Removing A GPU Card	87
Installing A GPU Card	88
iDRAC Ports Card	89
Removing The iDRAC Ports Card	89
Installing The iDRAC Ports Card	90
Replacing An SD vFlash Card	91
Internal Dual SD Module	91
Removing An Internal Dual SD Module	91
Installing An Internal Dual SD Module	92
Internal SD Card	93
Removing An Internal SD Card	93
Installing An Internal SD Card	93
Processors	94
Removing A Processor	94
Installing A Processor	96
Redundant AC Power Supply	97
Removing A Redundant AC Power Supply	98
Installing A Redundant AC Power Supply	99
Removing The Power Supply Blank	99
Installing The Power Supply Blank	100
Replacing The Power Supply Divider	100
Non-Redundant AC Power Supply	101
Removing A Non-Redundant AC Power Supply	101
Installing A Non-Redundant AC Power Supply	103
Power Distribution Board And Power Interposer Board	103
Removing The Power Interposer Board	103
Installing The Power Interposer Board	105
Replacing The Power Distribution Board	105
System Battery	105
Replacing The System Battery	105
Control-Panel Assembly	106
Removing The Control-Panel Assembly	107
Installing The Control-Panel Assembly	110
Removing The Control Panel	110
Installing The Control Panel	112
Removing The Control-Panel Board For Systems With LCD Modules	112
Installing The Control-Panel Board For Systems With LCD Modules	113
Removing The Control-Panel Board For Systems With Diagnostic Indicators	114
Installing The Control-Panel Board For Systems With Diagnostic Indicators	115
Removing The LCD Module	115
Installing The LCD Module	116
Removing The VGA Module—Rack Mode	117
Installing The VGA Module—Rack Mode	118
System Board	118
Removing The System Board	118
Installing The System Board	119
Converting The System From Tower Mode To Rack Mode	121
Safety Instructions	121
Preparing A System For Conversion From Tower Mode To Rack Mode	121
Rack Installation	123
Troubleshooting Your System	125
Safety First—For You And Your System	125
Troubleshooting System Startup Failure	125
Troubleshooting External Connections	125
Troubleshooting The Video Subsystem	125
Troubleshooting A USB Device	125
Troubleshooting A Serial I/O Device	126
Troubleshooting A NIC	126
Troubleshooting A Wet System	126
Troubleshooting A Damaged System	127
Troubleshooting The System Battery	128
Troubleshooting A Non-Redundant Power Supply	128
Troubleshooting Redundant Power Supplies	128
Troubleshooting Cooling Problems	129
Troubleshooting Cooling Fans	129
Troubleshooting System Memory	129
Troubleshooting An Internal USB Key	130
Troubleshooting An SD Card	130
Troubleshooting An Optical Or Tape Drive	131
Troubleshooting A Hard Drive	131
Troubleshooting Expansion Cards	132
Troubleshooting Processor	133
Using System Diagnostics	135
Dell Online Diagnostics	135
Dell Embedded System Diagnostics	135
When To Use The Embedded System Diagnostics	135
Running The Embedded System Diagnostics	135
System Diagnostic Controls	136
Jumpers And Connectors	137
System Board Jumper Settings	137
System Board Jumpers And Connectors	138
Disabling A Forgotten Password	139
Technical Specifications	141
System Messages	145
LCD Messages	145
Viewing LCD Messages	145
Removing LCD Messages	145
System Error Messages	145
Warning Messages	159
Diagnostic Messages	159
Alert Messages	159
Getting Help	161

Dell PowerEdge T420 Owner's Manual - Page 6

Converting The System From Tower Mode To Rack Mode

Page 6 highlights