Dell OptiPlex 7020 (Mid 2014) - Manual (Page 26)

6. Slide the I/O panel towards the left of the computer to release it and pull the I/O panel along with its
cable out of the computer.
Installing the Input/Output (I/O) Panel
1. Insert the I/O panel into the slot on the chassis front.
2. Slide the I/O panel towards the right of the computer to secure to the chassis.
3. Tighten the screw to secure the I/O panel to the chassis.
4. Thread the I/O panel, data cable and USB data cable into the chassis clip.
5. Connect the I/O panel, data cable and USB data cable to the system board.
6. Install :
a. front bezel
b. cover
7. Follow the procedures in After Working Inside Your Computer.
Removing the System Board
1. Follow the procedures in Before Working Inside Your Computer.
2. Remove the:
a. cover
b. memory
c. expansion card(s)
d. heat-sink assembly
e. processor
3. Disconnect all the cables connected to the system board.
26