Dell Vostro 2420 (Mid 2012) - Manual (Page 23)

Installing the Audio Board
1. Insert the audio board into its compartment and clip on the latch to secure it in place.
2. Connect the audio board cable to the system board.
3. Insert the coin-cell battery cable to its compartment and align it in place.
4. Connect the antennae to the WLAN card.
5. Install:
a) palmrest
b) keyboard
c) battery
6. Follow the procedures in After Working Inside Your Computer .
Removing the USB Board
1. Follow the procedures in Before Working Inside Your Computer .
2. Remove:
a) battery
b) keyboard
c) optical drive
d) palmrest
3. Disconnect the USB board cable from the system board.
4. Remove the screw that secures the USB board.
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