Dell Vostro 3550 (Early 2011) - Manual (Page 69)

Installing The Processor
1. Insert the processor into the processor socket. Ensure the processor is
properly seated.
2. Tighten the cam lock in a clockwise direction.
3. Install the
system board .
4. Install the display assembly .
5. Install the ExpressCard board .
6. Install the hold switch .
7. Install the WLAN card .
8. Install the palm rest .
9. Install the keyboard .
10. Install the WWAN card .
11. Install the hard drive .
12. Install the optical drive .
13. Install the memory module .
14. Install the access panel .
15. Install the ExpressCard .
16. Install the memory card .
17. Install the battery .
18. Follow the procedures in After Working Inside Your Computer .
69