4 Replacement Procedures 4.26 System board
4.26 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 and EC/KBC as described in Appendix G and
in Appendix H.
Removing the system board
The following describes the procedure for removing the system board (See Figure 4-39).
1. Pull up and remove the system board from the cover assembly.
2. Disconnect the battery power harness from the connector CN8020.
3. Disconnect the battery signal harness from the connector CN8811.
4. Disconnect the SD board flat cable from the connector CN9500.
5. Disconnect the ODD flat cable from the connector CN1810.
6. Disconnect the USB harness from the connector CN4611.
Battery power harness
Battery signal harness
CN8020
ODD flat cable
CN8811
SD board flat cable
CN9500
CN1810
CN1810 USB harness
Figure 4-39 Removing the system board
QOSMIO G20 Maintenance Manual (960-511) [CONFIDENTIAL] 4-61