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50 Replacing and Adding System Components
Replacing the system board
The system board is mounted on stand-off retention hooks on the right side
of the chassis. The board is secured by six screws, one on the back-right of
the chassis (outside), and five inside the chassis.
To remove the system board:
1 Turn off the system and disconnect the power cord, modem cord (if
installed), and all external peripheral devices.
2 Remove the left side cover panel. (See “Removing the side cover” on
page 18 and “Preventing static electricity discharge” on page 15.)
3 Place the chassis gently on its right side.
4 Remove all expansion cards from the system board. (See “Adding an
expansion card” on page 45.)
5 Disconnect all cables from the system board, including the power cables
from the power supply. Note where the cables are connected.
6 Remove the retaining screws securing the board to the right side of the
chassis (inside the chassis).
Important All references to front, rear, left, or right on the computer
are based on the computer being in a normal, upright
position, as viewed from the front.
System Board -
components
removed for
clarity
Remove retaining
screws from these
holes
Front
Rear
05032.book Page 50 Monday, July 10, 2000 11:43 AM