6. If removing the system board from model 4730s, remove the three Torx T8M2.0×5.0 screws (1)
that secure the system board to the computer, and the two Torx T8M2.0×5.0 screws (2) that
secure the hard drive extension board to the computer.
7. Lift the optical drive connector latch (3), and then disconnect the optical drive cable (4).
8. Lift the right side of the system board upward (5), and then lift it away enough to gain access to
the cables underneath (6).
9. On the bottom of the system board, disconnect the battery connector cable (1) from the system
board.
10. Disconnect the smaller power cable (2) and the larger power cable (3) from the system board.
11. Lift the system board out of the computer (4).
Reverse this procedure to install the system board.
88 Chapter 4 Removal and replacement procedures
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