Remove The Lower Case - Lenovo 8APU1 Hardware Maintenance Manual

Screw specifications
M2 x L3
Go to https://support.lenovo.com/partslookup
part:
Controller guide L and R

Remove the lower case

Make sure the device has been shut down and the following FRU (or CRU) has been removed before
servicing the device.
"Remove the game controller" on page 26
Step 1. Place the device upside down on a flat surface.
Step 2. Remove six screws.
Figure 5. Remove six screws
Screw specifications
M1.6 x L5
Step 3. Pry up the latches and then remove the lower case.
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Hardware Maintenance Manual
Number of screws
3
to look up the Lenovo part number of the following replacement
Number of screws
6