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Installing A Processor......................................................................................................................................87
Power Supplies.......................................................................................................................................................88
Hot Spare Feature............................................................................................................................................ 89
Removing An AC Power Supply....................................................................................................................... 89
Installing An AC Power Supply........................................................................................................................ 90
Wiring Instructions For A DC Power Supply.................................................................................................... 91
Removing A DC Power Supply......................................................................................................................... 93
Installing A DC Power Supply.......................................................................................................................... 94
Removing The Power Supply Blank................................................................................................................. 95
Installing The Power Supply Blank.................................................................................................................. 95
System Battery....................................................................................................................................................... 95
Replacing The System Battery.........................................................................................................................95
Hard-Drive Backplane............................................................................................................................................ 96
Removing The Hard-Drive Backplane..............................................................................................................97
Installing The Hard-Drive Backplane.............................................................................................................110
Removing The Optional Hard-Drive Backplane (Back)..................................................................................111
Installing The Optional Hard-Drive Backplane (Back)................................................................................... 113
Control Panel Board..............................................................................................................................................114
Removing The Control Panel (PowerEdge R720)............................................................................................114
Installing The Control Panel (PowerEdge R720).............................................................................................115
Removing The Control Panel (PowerEdge R720xd)........................................................................................116
Installing The Control Panel (PowerEdge R720xd).........................................................................................117
Removing The I/O Panel (PowerEdge R720xd)...............................................................................................118
Installing The I/O Panel (PowerEdge R720xd)................................................................................................119
System Board........................................................................................................................................................119
Removing The System Board......................................................................................................................... 119
Installing The System Board.......................................................................................................................... 121
4 Troubleshooting Your System............................................................................................... 123
Safety First—For You And Your System............................................................................................................... 123
Troubleshooting System Startup Failure.............................................................................................................. 123
Troubleshooting External Connections.................................................................................................................123
Troubleshooting The Video Subsystem................................................................................................................ 123
Troubleshooting A USB Device............................................................................................................................ 123
Troubleshooting A Serial I/O Device.................................................................................................................... 124
Troubleshooting A NIC..........................................................................................................................................124
Troubleshooting A Wet System............................................................................................................................124
Troubleshooting A Damaged System................................................................................................................... 125
Troubleshooting The System Battery................................................................................................................... 126
Troubleshooting Power Supplies..........................................................................................................................126
Troubleshooting Cooling Problems.......................................................................................................................126
Troubleshooting Cooling Fans.............................................................................................................................. 127