Dell Vostro 3550 (Early 2011) - Manual (Page 89)

Installing The System Board
1. Align the system board to the port connectors on the rear of the chassis
and place the system board in the computer.
2. Tighten the screws to secure the system board in place.
3. Install the speaker cable.
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 battery .
89