Dell Vostro 2421 (Early 2013) - Manual (Page 21)

Installing the Input/Output (I/O) Board
1. Place the I/O board in its slot and snap it in place.
2. Tighten the screw to secure the I/O board to the computer.
3. Connect the I/O cable to the system board.
4. Install:
a) palmrest
b) keyboard
c) access panel
d) battery
5. Follow the procedures in After Working Inside Your Computer .
Removing the Coin-Cell Battery
1. Follow the procedures in Before Working Inside Your Computer .
2. Remove:
a) battery
b) access panel
c) keyboard
d) palmrest
e) wireless mini-card
3. Pry out the coin-cell battery from the system board.
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