Dell T420 Owner's Manual download pdf (Page 82)

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10. Close the system.

11. If applicable, place the system upright on a flat, stable surface and rotate the system feet outward.

12. Reconnect the system to its electrical outlet and turn the system on, including any attached peripherals.

Figure 41. Removing and Installing the External Cooling Fan

1. back of the system chassis

2. lower hooks (2)

3. external cooling fan

4. screws (4)

5. upper hook

6. external cooling fan power cable slot

7. external cooling fan power cable

Figure 42. Cabling—External Cooling Fan

1 2 ... 77 78 79 80 81 82 83 84 85 86 87 ... 166 167

Dell PowerEdge T420 Systems 1
Owner's Manual 1
Notes, Cautions, and Warnings 2
Contents 3
About Your System 9
LCD Panel Features 15
Home Screen 16
Setup Menu 16
Diagnostic Indicators 17
Hard-Drive Indicator Patterns 19
NIC Indicator Codes 22
Getting Started Guide 24
Choosing The System Boot Mode 25
Entering System Setup 26
System Setup Options 27
Memory Settings Screen 28
Processor Settings Screen 28
SATA Settings Screen 30
Boot Settings Screen 30
Integrated Devices Screen 31
Serial Communications Screen 31
System Security Screen 33
Miscellaneous Settings 34
Boot Manager Screen 37
Embedded System Management 38
4. Click Back → Finish → Yes 39
Installing System Components 41
System Feet—Tower Mode 42
Removing The System Feet 43
Installing The System Feet 43
Removing The Wheel Assembly 44
Installing The Wheel Assembly 45
Opening The System 45
Inside The System 46
1. optical drive 50
2. tape drive 50
3. release latch 50
Cooling Shroud 52
Installing The Cooling Shroud 53
Hard Drives—Hot-Swappable 54
Hard Drives—Cabled 59
Removing A Cabled Hard Drive 61
Hard-Drive Backplane 63
1. x8 hard-drive backplane 64
2. release pin 64
3. hooks (11) 64
1. x16 hard-drive backplane 67
3. hooks (7) 67
Four-Slot Hard-Drive Blank 70
System Memory 71
Mode-Specific Guidelines 74
Sample Memory Configurations 75
Removing Memory Modules 76
Installing Memory Modules 78
Cooling Fans 79
PCIe Card Holder (Optional) 85
Expansion Cards 86
Removing An Expansion Card 87
Installing An Expansion Card 88
Removing A GPU Card 89
Installing A GPU Card 90
Removing The iDRAC Ports Card 91
Internal Dual SD Module 93
Internal SD Card 95
Processors 96
Installing A Processor 98
Redundant AC Power Supply 99
Non-Redundant AC Power Supply 103
System Battery 107
Control-Panel Assembly 108
Removing The Control Panel 112
Installing The Control Panel 114
Removing The LCD Module 117
Installing The LCD Module 118
System Board 120
Installing The System Board 121
Rack Mode 123
Rack Installation 125
Troubleshooting Your System 127
Troubleshooting A NIC 128
Troubleshooting A Wet System 129
Troubleshooting Cooling Fans 131
Troubleshooting System Memory 131
Troubleshooting An SD Card 133
Troubleshooting A Hard Drive 134
Troubleshooting Processor 135
Using System Diagnostics 137
System Diagnostic Controls 138
Jumpers And Connectors 139
Technical Specifications 143
System Messages 149
Warning Messages 165
Diagnostic Messages 165
Alert Messages 165
Getting Help 167

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Dell T420 Owner's Manual Page 82

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