Toshiba T4900CT Manual page 159

5. Remove one M2.5x6 screw and two M2x6 screws securing the lower system
board and lift it out of the base assembly frame (figure 4-37).
6. Turn the lower system board over and disconnect the sound system board from
the lower system board (figure 4-38).
4-40
Figure 4-37 Removing the lower system board
Figure 4-38 Removing the sound system board
T4900CT