Installing the rear cover............................................................................................................................................. 34
Power module assembly.................................................................................................................................................. 35
Removing power module assembly......................................................................................................................... 35
Installing the power module assembly.................................................................................................................... 36
Cooling fans........................................................................................................................................................................ 37
Removing the witness fan......................................................................................................................................... 37
Installing the witness fan........................................................................................................................................... 38
Power supply unit..............................................................................................................................................................39
Removing a power supply unit blank...................................................................................................................... 39
Removing a power supply unit................................................................................................................................. 39
Installing a power supply unit................................................................................................................................... 40
Installing a power supply unit blank.........................................................................................................................42
Witness sled........................................................................................................................................................................42
Removing a witness sled blank.................................................................................................................................42
Installing a witness sled blank...................................................................................................................................43
Removing the witness sled....................................................................................................................................... 44
Installing the witness sled..........................................................................................................................................45
Chapter 6: Getting help............................................................................................................... 47
Recycling or End-of-Life service information.............................................................................................................47
Contacting Dell Technologies......................................................................................................................................... 47
Accessing system information by using QRL..............................................................................................................47
Quick Resource Locator for PowerEdge XR4000r system...............................................................................48
Receiving automated support with SupportAssist ...................................................................................................48
Chapter 7: Documentation resources...........................................................................................49
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