Compaq Evo N180 Maintenance And Service Manual page 117

Removal and Replacement Procedures
2. Position the computer so the rear panel faces forward.
3. Remove the four HM5 × 10.5 screwlocks that secure the
system board to the base enclosure (Figure 5-32).
Figure 5-32. Removing the System Board Screwlocks
4. Position the computer so the front faces forward.
Maintenance and Service Guide 5–45