Dell Vostro 2521 (Early 2013) - Manual (Page 19)

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) optical-drive assembly
d) memory module
e) access panel
f) battery
5. Follow the procedures in After Working Inside Your Computer .
Removing the System Board
1. Follow the procedures in Before Working Inside Your Computer .
2. Remove:
a) battery
b) access panel
c) memory module
d) hard-drive assembly
e) SD card
f) optical-drive assembly
g) keyboard
h) palmrest
i) wireless mini-card
3. Peel the tape that secures the display cable to the system board.
4. Disconnect the display cable from the connector on the system board.
5. Disconnect the following cables:
a) DC-In port cable
b) speaker cable
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