Lenovo H420 Desktop - Manual (Page 31)

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Hardware Replacement Guide
Replacing the heatsink assembly
Attention:
Do not remove the computer cover or attempt any repair before reading the
“Important safety information” in the Safety and Warranty Guide that was
included with your computer or in the Hardware Maintenance Manual (HMM)
for the computer. To obtain copies of the Safety and Warranty Guide or
HMM, go to the Support Web site at: http://consumersupport.lenovo.com
To replace the heatsink assembly:
1. Remove the computer cover. Refer to “Removing the computer cover”.
2. Lay the computer on its side.
3. Locate the heatsink. Refer to “Identifying parts on the system board”.
4. Disconnect the heatsink and the fan assembly cable from the system board.
5. Remove the four screws securing the heatsink and fan assembly to the
system board.
6. Lift the failing heatsink and fan assembly off the system board.