- Notes, cautions, and warnings
- Working inside your computer
- Removing and installing components
- Recommended tools
- Screw List
- Major components of your system
- Side cover
- Front bezel
- Hard-drive assembly
- Removing the primary 2.5-inch hard-drive assembly
- Removing the secondary 2.5-inch hard-disk drive assembly
- Removing the 2.5-inch hard-disk drive bracket
- Installing the 2.5-inch hard-disk drive bracket
- Installing the secondary 2.5-inch hard-disk drive assembly
- Installing the primary 2.5-inch hard-drive assembly
- 3.5 in. hard-drive assembly
- Solid-state drive
- Memory module
- Processor fan and heat-sink assembly
- Processor
- Graphics card
- Graphical processing unit
- Coin-cell battery
- WLAN card
- Slim optical-drive
- Slim optical-drive bracket
- Chassis fan
- Voltage regulator heat sink
- Speaker
- Power button
- Power-supply unit
- Intrusion switch
- Optional I/O modules (Type C/ HDMI/VGA/DP/Serial)
- System board
- Software
- System setup
- Troubleshooting
- Getting help and contacting Dell
OptiPlex 7090 Tower Service Manual
Removing the power-supply unit
Prerequisites
- Follow the procedure in before working inside your computer.
- Remove the side cover.
- Remove the processor fan and heat-sink assembly.
NOTE Note the routing of all cables as you remove them so that you can route them correctly while you are replacing the power-supply unit.
About this task
The following images indicate the location of the power-supply unit and provide a visual representation of the removal procedure.
Steps
- Lay the computer on the right side.
- Disconnect the power cables from the system board and unroute them from the routing guides on the chassis.
- Remove the three (#6-32) screws that secure the power-supply unit to the chassis.
- Press the securing clip and slide the power-supply unit away from the back of the chassis.
- Lift the power-supply unit off the chassis.
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