Lenovo Yoga Book 9i Hardware Maintenance Manual page 41

"Remove the hinge covers" on page 27
"Remove the C cover LCD panel" on page 28
"Remove the force brackets" on page 32
Step 1. Tear the two pieces of shielding mylar from the heat sink (1).
Note: The shielding mylar is reusable if it is not damaged.
Figure 18. Remove the shielding mylar
Step 2. Loosen four screws under the two pieces of shielding mylar (2). Remove two screws (3) and then
remove the heat sink (4).
Note: When removing the heat sink, overturn it to avoid the silicone grease on the back is stained.
Figure 19. Remove screws and remove the heat sink
Screw specifications
M2 x L2.5
Go to
https://support.lenovo.com/partslookup
parts:
Shielding mylar
Heat sink
1
1
to look up the Lenovo part number of the following replacement
Number of screws
2
.
Chapter 4 Removing a FRU or CRU
35