Acer ASPIRE E1-521 Service Manual page 139

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