Recommended tools......................................................................................................................................................... 35
Screw list.............................................................................................................................................................................36
Major components of your OptiPlex All-in-One Plus 7420......................................................................................37
Chapter 5: Removing and installing Customer Replaceable Units (CRUs).................................... 40
Stand.................................................................................................................................................................................... 40
Removing the stand....................................................................................................................................................40
Installing the stand.......................................................................................................................................................41
Back cover.......................................................................................................................................................................... 43
Removing the back cover..........................................................................................................................................43
Installing the back cover............................................................................................................................................43
Memory................................................................................................................................................................................44
Removing the memory............................................................................................................................................... 44
Installing the memory................................................................................................................................................. 45
Graphics card..................................................................................................................................................................... 47
Removing the graphics card..................................................................................................................................... 47
Installing the graphics card....................................................................................................................................... 49
System-board shield..........................................................................................................................................................51
Removing the system-board shield......................................................................................................................... 51
Installing the system-board shield...........................................................................................................................52
Wireless card...................................................................................................................................................................... 53
Removing the wireless card......................................................................................................................................53
Installing the wireless card........................................................................................................................................ 54
Solid-state drive in M.2 slot 0........................................................................................................................................56
Removing the M.2 2230 solid-state drive in M.2 slot 0.................................................................................... 56
Installing the M.2 2230 solid-state drive in M.2 slot 0.......................................................................................57
Removing the M.2 2280 solid-state drive in M.2 slot 0.....................................................................................57
Installing the M.2 2280 solid-state drive in M.2 slot 0.......................................................................................58
Location of the screw mount on M.2 slot 0......................................................................................................... 59
Solid-state drive in M.2 slot 1.........................................................................................................................................60
Removing the M.2 2230 solid-state drive in M.2 slot 1..................................................................................... 60
Installing the M.2 2230 solid-state drive in M.2 slot 1........................................................................................ 61
Removing the M.2 2280 solid-state drive in M.2 slot 1..................................................................................... 62
Installing the M.2 2280 solid-state drive in M.2 slot 1........................................................................................63
Location of the screw mount on M.2 slot 1.......................................................................................................... 64
Coin-cell battery................................................................................................................................................................65
Removing the coin-cell battery................................................................................................................................65
Installing the coin-cell battery..................................................................................................................................66
I/O cover............................................................................................................................................................................. 67
Removing the I/O cover............................................................................................................................................ 67
Installing the I/O cover.............................................................................................................................................. 68
Bottom cover..................................................................................................................................................................... 69
Removing the bottom cover.....................................................................................................................................69
Installing the bottom cover....................................................................................................................................... 70
Retractable-camera assembly.........................................................................................................................................71
Removing the retractable-camera assembly......................................................................................................... 71
Installing the retractable-camera assembly...........................................................................................................72
Fan........................................................................................................................................................................................ 74
Removing the fan........................................................................................................................................................ 74
Installing the fan.......................................................................................................................................................... 75
4
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