Dell Precision T7400 (Late 2007) - Manual (Page 149)

Adding and Replacing Parts 149
11 Remove the mounting screws from the I/O panel.
12 Lift to remove the I/O panel from the computer.
Replacing the I/O Panel
NOTICE: Ensure that you replace all cables originally attached to the I/O panel or
you may experience computer problems.
Follow the removal procedure ("Removing the I/O Panel" on page 148) in
reverse order. Ensure that the plastic piece that fits over the screw hole is in
place, secured by the screw that fastens the I/O panel to the chassis.
1 I/O panel 2 mounting screws
1
2