Dell Vostro 270 (Late 2012) - Manual (Page 24)

4. Lift the coin-cell battery out of the computer.
Installing the Coin-Cell Battery
1. Place the coin-cell battery in it's socket on the system board.
2. Press the coin-cell battery into the socket till it snaps into place.
3. Replace the cover.
4. 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 the:
a) cover
b) memory
c) system fan
d) processor
e) expansion card
f) WLAN card
3. Disconnect and un-thread all the cables connected to the system board.
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