Acer Aspire 4743Z Service Manual page 159

5. Close the LCD panel and turn the computer over so that the base is facing up.
6. Secure the upper cover with the twelve (12) screws.
Figure 3-142. Lower Cover Screws
Table 3-31. Screws
Step
Upper Cover Assembly
Machine Maintenance
Screw
M2.5 x L6
M2 x L3
Quantity Screw Type
9
3
3-89