Acer Aspire E1-531 Acer Aspire E1-531 and E1-571 Notebook Service Guide - Page 108

5. Attach the 21 screws to secure the upper case and the lower case. Figure 3:55. Attaching the Upper and Lower Case Screws 6. Install the keyboard (see Keyboard Installation on page 3-32). 7. Install the base door (see Base Door Installation on page 3-13). Table 3:8. Upper and Lower Case Screws Screw Name Screw Type M 2.0 x 2.5 Quantity 3 M 2.5 x 5.0 2 M 2.5 x 8.0 16 3-40 Service and Maintenance