Dell OptiPlex 9020 (Mid 2013) - Manual (Page 24)

Installing the Power Supply
1. Place the power supply in the chassis and slide towards the back of the computer to secure it.
2. Tighten the screws securing the power supply to the back of the computer.
3. Connect the 4-pin and 8–pin power cables to the system board.
4. Thread the power cables into the chassis clips.
5. Install the:
a) drive cage
b) optical drive
c) front bezel
d) cover
6. Follow the procedures in After Working Inside Your Computer .
Removing the Coin-Cell Battery
1. Follow the procedures in Before Working Inside Your Computer .
2. Remove the:
a) cover
b) front bezel
c) drive cage
3. Press the release latch away from the battery to allow it to pop-up from the socket and then lift the coin-cell battery
out of the computer.
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