Lenovo IdeaPad C340-14IML Hardware Maintenance Manual page 36

Figure 1. Remove the 10 screws
Screw specifications
M2.0 x 6
Step 2. Insert a pry tool to separate the lower case from upper case.
Figure 2. Separate the lower case from upper case
Step 3. Remove the lower case.
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Hardware Maintenance Manual
Number of screws
10