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Installing The Redundant Power Supply Unit Divider...................................................................................... 89
System Battery....................................................................................................................................................... 90
Replacing The System Battery.........................................................................................................................90
Hard-Drive Backplane............................................................................................................................................ 91
Removing The Hard-Drive Backplane..............................................................................................................91
Installing The Hard-Drive Backplane...............................................................................................................94
Control Panel Assembly..........................................................................................................................................95
Removing The Control-Panel Board.................................................................................................................95
Installing The Control-Panel Board..................................................................................................................96
Removing The Control Panel............................................................................................................................96
Installing The Control Panel.............................................................................................................................97
System Board..........................................................................................................................................................97
Removing The System Board...........................................................................................................................98
Installing The System Board............................................................................................................................ 99
4 Troubleshooting Your System............................................................................................... 101
Safety First—For You And Your System............................................................................................................... 101
Troubleshooting System Startup Failure.............................................................................................................. 101
Troubleshooting External Connections.................................................................................................................101
Troubleshooting The Video Subsystem................................................................................................................101
Troubleshooting A USB Device............................................................................................................................ 101
Troubleshooting A Serial I/O Device.................................................................................................................... 102
Troubleshooting A NIC..........................................................................................................................................102
Troubleshooting A Wet System............................................................................................................................103
Troubleshooting A Damaged System................................................................................................................... 103
Troubleshooting The System Battery................................................................................................................... 104
Troubleshooting Power Supplies..........................................................................................................................104
Troubleshooting Cooling Problems.......................................................................................................................105
Troubleshooting Cooling Fans.............................................................................................................................. 105
Troubleshooting System Memory.........................................................................................................................105
Troubleshooting An Internal USB Key..................................................................................................................106
Troubleshooting An SD Card................................................................................................................................ 106
Troubleshooting An Optical Drive.........................................................................................................................107
Troubleshooting A Hard Drive.............................................................................................................................. 108
Troubleshooting A Storage Controller..................................................................................................................108
Troubleshooting Expansion Cards........................................................................................................................109
Troubleshooting Processors.................................................................................................................................110
5 Using System Diagnostics..................................................................................................... 111
Dell Online Diagnostics.........................................................................................................................................111
Dell Embedded System Diagnostics.....................................................................................................................111
When To Use The Embedded System Diagnostics........................................................................................111