Dell Inspiron 1428 (Late 2009) - Manual (Page 76)

76 System Board
Replacing the System Board
1 Follow the procedures in "Before You Begin" on page 9.
2 Replace the coin-cell battery (see "Replacing the Coin-Cell Battery" on
page 80).
3 Turn the system board over.
4 Align the connectors on the system board with the slots on the computer
base and place the system board on the computer base.
NOTE: Ensure that all the connectors on the system board are seated
properly in their respective slots.
5 Replace the two screws that secure the system board to the computer base.
6 Connect the I/O board cable and the audio board cable to their respective
connectors on the system board.
7 Turn the computer over and connect the AC adapter connector cable to
the system board connector.
8 Replace the processor module (see "Replacing the Processor Module" on
page 44).