Dell 23.8" OptiPlex 7410 All-in-One Desktop Computer (Gray) - Manual (Page 99)

Steps
1. Remove the three screws (M3x5) that secure the power-button and I/O board shield to the display-assembly base.
2. Lift the power-button and I/O board shield off the display-assembly base.
3. Lift the latch and disconnect the power cable (DB-PWR) from the power-button and I/O board.
4. Lift the latch and disconnect the high-speed cable (DB-HS) from the power-button and I/O board.
5. Remove the two screws (M3x5) that secure the power-button and I/O board to the display-assembly base.
6. Lift the power-button and I/O board off the display-assembly base.
Installing the power-button and I/O board
Prerequisites
If you are replacing a component, remove the existing component before performing the installation process.
About this task
The following image(s) indicate the location of the power-button and I/O board and provides a visual representation of the
installation procedure.
Removing and installing Field Replaceable Units (FRUs) 99