Dell OptiPlex 170L - Manual (Page 54)

Mini-Tower Computer
Replacing the I/O Panel
1. Follow the procedures in " Before You Begin ."
2. Remove the hard drive(s).
3. Cut the tie wrap cord that secures the I/O panel cables to the computer frame.
4. Release and remove the front panel:
a. For computers with the release lever, push the release lever to release the top tab. See the following figure.
For computers without the release lever, reach inside the computer and push the top tab toward you to release it.
b. Reach inside the computer and push the bottom tab toward you to release it (the middle tab releases automatically).
c. Rotate the front panel to separate it from the side hinges.
5. Remove the two screws that secure the I/O panel to the computer.
1 side hinges (3) 4 middle tab
2 front panel 5 bottom tab
3 top tab 6 release lever (not on all computers)