Lenovo 14w 81MQ Hardware Maintenance Manual page 52

Step 2. Remove the 4 screws that secure the two hinges to the upper case.
Figure 30. Remove the 4 screws
Screw specifications
5
M2.5 x 4.0
Step 3. Open the 2 hinges.
Figure 31. Open the hinges
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Hardware Maintenance Manual
Number of screws
4
Color
Silver