Lenovo IdeaPad 3 Series Hardware Maintenance Manual page 71

Figure 54. Remove four screws and open both hinges
Screw specifications
M2.5 x L5
Step 3. Remove the upper case assembly.
Attention: When disassembling the upper case, handle the LCD module and upper case with care.
Figure 55. Remove the upper case assembly
Go to
https://support.lenovo.com/partslookup
replacement part:
Upper case (with keyboard)
Number of screws
4
to look up the Lenovo part numbers of the following
.
Chapter 4 Removing a FRU or CRU
65