Dell OptiPlex 7450 All-In-One Owner's Manual

Removing the chassis frame

1. Follow the procedure in Before working inside your computer.
2. Remove the:
   1. stand
   2. back cover
   3. cable cover
   4. speaker cover
   5. speaker
   6. hard drive
   7. optical drive
   8. VESA mount bracket
   9. system board shield
   10. SSD card
   11. WLAN card
   12. memory
   13. heat sink
   14. system fan
   15. processor
   16. coin cell battery
   17. power supply unit
   18. system board
3. Unroute the cables though the retention clips.
   
4. To remove the chassis frame:
   • NOTE: There is a cable that is taped/glued down to the chassis frame. That cable runs down from the On-Screen Display (OSD) and into a connector on the Display Bezel for the Power Button board below the OSD Button board. Trying to lift the chassis frame without disconnecting this cable first could damage the connector.
   1. Peel the adhesive tapes that secure the chassis frame [1].
   2. Remove the screws that secure the chassis frame to the computer. [2].
      NOTE: Chassis frame screws have M3 and M2 stamped next to them.
   3. Remove the cables from the chassis frame and lift the chassis frame away from the computer. [3].