Toshiba L20 4.20 System board

Replacement Procedures
4
4.20 System board
CAUTION: 1. When handling the system board, always hold by the edges. Do not touch
the printed circuit face.
2. If replacing with a new system board, execute the subtest01 Initial
configuration in section 3.3 “Setting of the hardware configuration”. Also
update with the latest BIOS as described in Appendix G “BIOS Rewrite
Procedures” and with the latest EC/KBC as described in Appendix H
“EC/KBC Rewrite Procedures”.
Removing the system board
The following describes the procedure for removing the system board (See Figure 4-41).
1. Disconnect the speaker cable from the connector CN11 on the system board.
2. Remove the following screws securing the system board and remove the system
board.
• M2.5×4.0 BIND screw x2
M2.5x4.0 BIND SCREW
CN11
S
p
eaker cable
Figure 4-21 Removing the system board
188 Satellite L20 Maintenan ce Manual(960-Q01)