Dell 23.8" OptiPlex 7410 All-in-One Desktop Computer (Gray) - Manual (Page 50)

Steps
1. Remove the six screws (M3x5) that secure the system-board shield to the display-assembly base.
2. Lift the system-board shield off the display-assembly base.
Installing the system-board shield
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 system-board shield and provides a visual representation of the installation
procedure.
50 Removing and installing Customer Replaceable Units (CRUs)