Toshiba Satellite M640 Maintenance Manual page 184

4.9 Logic Upper Assembly
4. Secure the logic upper assembly with one M2x3 screw, one M2.5x15 screw and three
M2.5x8 screws, as indicated in Figure 4.17.
5. Turn the laptop upside down.
6. Secure the logic upper assembly with thirteen screws as indicated in Figure 4.16:
− Eleven M2.5x8 screws
− One M2.5x4 screw
− One M2x3 screw
Satellite M600/M640/M645/M647 Maintenance Manual
4 Replacement Procedures
4-31