For 15-Inch And 17-Inch Models; Remove The Memory Module - Lenovo IdeaPad 3 Series Hardware Maintenance Manual

Screw specifications (14–inch models)
M2 x L6
Go to https://support.lenovo.com/partslookup
replacement part:
Lower case
For 15–inch and 17–inch models
Make sure the computer has been shut down before servicing the computer.
Step 1. Place the computer upside down on a flat surface.
Step 2. Remove 10 screws and then remove the lower case.
Figure 6. Remove 11 screws
Screw specifications (15–inch models)
M2 x 2.5
Screw specifications (17–inch models)
M2 x L6
M2 x L4
Go to
https://support.lenovo.com/partslookup
replacement part:
Lower case

Remove the memory module

Make sure the following FRUs (or CRUs) have been removed.
Number of screws
9
to look up the Lenovo part numbers of the following
Number of screws
10
Number of screws
6
4
to look up the Lenovo part numbers of the following
.
Chapter 4 Removing a FRU or CRU
33