Disassembly order
For convenience, disassembly procedures should be followed in a particular order. Use the following
table to determine the sequence in which to access major workstation components.
Table 5-4 Workstation component installation
To install/
replace...
Remove... Then
remove...
Then
remove...
Then
remove...
Then
remove...
Then
remove...
Then
remove...
Hard drive, battery,
front bezel, rear
system fan, side
access panel sensor,
or solenoid lock
Chassis lock Side access
panel
Memory, liquid
cooling system,
heatsink, or power
supply
Chassis lock Side access
panel
Airflow
guide
Processor Chassis lock Side access
panel
Airflow
guide
Heatsink
Front fan Chassis lock Side access
panel
Full-length
expansion
cards
Expansion card (PCI/
PCIe)
Chassis lock Side access
panel
Expansion
card hold
down clamp
or support
Front panel I/O
assembly, power
button assembly, side-
access panel sensor,
or system speaker
Chassis lock Side access
panel
Front bezel
Optical bay filler or
optical drive
Chassis lock Side access
panel
Airflow
guide
Front bezel
System board Chassis lock Side access
panel
Airflow
guide
Expansion
card hold
down clamp
or support
Expansion
cards or
DIMMs
Liquid
cooling
system (If
any)
Heatsink
(optional)
NOTE: Z400s with 4 DIMM slots do not have an airflow guide.
76 Chapter 5 Replacing components ENWW