Dell 23.8" OptiPlex 7410 All-in-One Desktop Computer (Gray) - Manual (Page 101)

Audio board
Removing the audio board
Prerequisites
1. Follow the procedure in Before working inside your computer .
2. Remove the stand .
3. Remove the back cover .
4. Remove the system-board shield .
5. Remove the I/O cover .
6. Remove the bottom cover .
7. Remove the I/O bracket .
About this task
The following image(s) indicate the location of the audio board and provides a visual representation of the removal procedure.
Steps
1. Remove the three screws (M3x5) that secure the audio board shield to the display-assembly base.
Removing and installing Field Replaceable Units (FRUs) 101