Dell OptiPlex 9020 (Mid 2013) - Manual (Page 7)

3. Connect the network cable (optional).
Figure 10. Network Connection
4. Connect the power cable(s).
Figure 11. Connecting Power
5. Press the power buttons on the monitor and the computer.
Figure 12. Turning On Power
Specifications
NOTE: Offerings may vary by region. The following specifications are only those
required by law to ship with your computer. For more information regarding the
configuration of your computer, click Start → Help and Support and select the
option to view information about your computer.
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