Lenovo Legion Y540-15 Series Hardware Maintenance Manual page 47

"Remove the lower case" on page 30
"Remove the battery pack" on page 31
"Remove the heat sink" on page 40
Step 1. Detach the 2 fan connectors.
Figure 27. Detach the 2 connectors
Step 2. Remove the 4 screws.
Figure 28. Remove the 4 screws
Screw specifications
2 M2.0 x 5.0
Step 3. Remove the 2 fans.
Number of screws
4
.
Chapter 4 Removing a FRU or CRU
41