Dell PowerEdge R420 Owner's Manual - Page 5

Removing The Optical Drive In Cabled Hard-Drive Systems 58 Installing The Optical Drive In Cabled Hard-Drive Systems 59 Cooling Fans...60 Removing A Cooling Fan...60 Installing A Cooling Fan...61 Internal USB Memory Key (Optional)...62 Replacing The Internal USB Key...62 Expansion Cards And Expansion-Card Risers...62 Expansion Card Installation Guidelines...63 Removing An Expansion Card...63 Installing An Expansion Card...65 Removing Expansion-Card Risers 1 And 2...66 Installing Expansion-Card Risers 1 And 2...67 iDRAC Ports Card (Optional)...67 Removing The iDRAC Ports Card...68 Installing The iDRAC Ports Card...69 SD vFlash Card...69 Replacing An SD vFlash Card...69 Internal Dual SD Module...70 Removing The Internal Dual SD Module...70 Installing The Internal Dual SD Module...71 Internal SD Card...72 Removing An Internal SD Card...72 Installing An Internal SD Card...72 Integrated Storage Controller Card...72 Removing The Integrated Storage Controller Card 73 Installing The Integrated Storage Controller Card 74 Processors...74 Removing A Processor...74 Installing A Processor...76 Power Supplies...77 Hot Spare Feature...78 Removing A Redundant Power Supply...78 Installing A Redundant Power Supply...79 Removing A Non-Redundant Power Supply...79 Installing A Non-Redundant Power Supply...80 Removing The Power Supply Blank...81 Installing The Power Supply Blank...81 System Battery...81 Replacing The System Battery...81 Hard-Drive Backplane...82 Removing The Hard-Drive Backplane...83