Remove The Fans - Lenovo Y540-17 Series Hardware Maintenance Manual

Figure 28. Loosen the 7 screws
Step 2. Remove the heat sink.
Figure 29. Remove the heat sink
Refer to "Major FRUs and CRUs" on page 24 to look up details about the following replacement part:
Heat sink

Remove the fans

Make sure the following FRUs (or CRUs) have been removed.
"Remove the service door" on page 30
"Remove the Solid State Drive (SSD)" on page 30
"Remove the Hard Disk Drive (HDD)" on page 32
"Remove the lower case" on page 35
"Remove the battery pack" on page 36
"Remove the heat sink" on page 41
Step 1. Detach the 2 fan connectors from the system board.
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Hardware Maintenance Manual