Compaq Presario,Presario 900 Maintenance And Service Manual page 142

Removal and Replacement Procedures
5. Remove the three TM2.5 × 5.0 screws 1 that secure the top
cover to the base enclosure (Figure 5-39).
6. Remove the top cover from the base enclosure 2.
Figure 5-39. Removing the Top Cover
5–50 Maintenance and Service Guide