Dell Vostro 2421 (Early 2013) - Manual (Page 24)

5. Remove the screw that secures the system board to the computer and lift the system board from the computer.
Installing the System Board
1. Align the system board in its place on the computer.
2. Tighten the screw to secure the system board to the computer.
3. Connect the following cables:
a) display
b) DC-In Port
c) speaker
d) I/O board
4. Affix the tape to secure the display cable to the system board.
5. Install:
a) wireless mini-card
b) palmrest
c) keyboard
d) optical-drive assembly
e) hard-drive assembly
f) memory module
g) access panel
h) battery
6. Follow the procedures in After Working Inside Your Computer .
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