Dell OptiPlex 5400 Service Manual page 89

Steps
1. Slide and align the middle frame to the slots on the display-assembly base, then snap the middle frame into place on the
display-assembly base.
2. Replace the 17 screws (M3x5) to secure the middle frame to the display-assembly base.
Next steps
1. Install the display panel.
2. Install the antenna modules.
3. Install the side-I/O board.
4. Install the PSU.
5. Install the PSU fan.
6. Install the microphones.
7. Install the power-button
8. Install the system board.
9. Install the camera assembly.
10. Install the speakers.
11. Install the rear-I/O bracket.
12. Install the bottom cover.
13. Install the wireless card.
14. Install the hard drive.
15. Install the system-board
16. Install the back cover.
17. Install the cable cover
18. Install the stand.
19. Follow the procedure in
board.
shield.
(optional).
After working inside your computer.
Removing and installing components 89