Toshiba T4900CT Manual page 146

4.11 Speaker, Upper System Board, and Power Supply Board
Removing the Speaker, Upper System Board, and Power Supply Board
To remove the T4900CT's upper system board and power supply board, follow the steps
below and refer to figures 4-25 through 4-27.
1. Turn off the power to the T4900CT. Disconnect the AC adapter, power cord, and
all external cables connected to the T4900CT.
2. Remove the battery pack, optional memory card, optional PCMCIA card, HDD
pack, top cover, keyboard, status indicator panel, backup battery/microphone, and
display assembly as described in sections 4.2 through 4.10.
3. If you have not already done so, turn the computer upside down and remove one
M2.5x11 screw (next to the battery terminal).
4. Remove the left hinge cover and tape, then remove the five M2.5x6 screws
securing the upper system board cover (figure 4-25).
5. Remove two M2.5x6 screws securing the FDD plate and remove the plate.
Figure 4-25 Removing the upper system board cover
T4900CT
4-27