Installing The I/O Board Shield; Removing The Power Supply Unit (Psu) - Dell OptiPlex 9020 AIO Owner's Manual

Installing the I/O Board Shield

1. Connect the power-connector cable to the system board.
2. Place the I/O board shield on the computer.
3. Pass the power connector and fix it to the socket. Tighten the screws that secure the I/O board shield to the
chassis.
4. Tighten the screws that secure the power connector to the I/O shield.
5. Place the I/O panel on the computer.
6. Install:
a) power-supply fan
b) system-board shield
c) VESA mount bracket
d) back cover
e) VESA stand
7. Follow the procedures in

Removing the Power Supply Unit (PSU)

1. Follow the procedures in
2. Remove the:
a) VESA stand
b) back cover
c) VESA mount bracket
d) system-board shield
e) input/output (I/O) board shield
f) power-supply fan
3. Disconnect the power-supply cables from the system board. Unthread the cable from the hooks in the computer.
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After Working Inside Your Computer .
Before Working Inside Your Computer .