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15. Install the four screws 1 to secure the heat sink.
16. Install the new system board assembly into the computer chassis, align the
screw holes, and install the screws.
Note: Use only the screws provided by Lenovo.
17. Reconnect all cables that were disconnected from the system board. Make sure
all cables are routed correctly. See “Identifying parts on the system board” on
page 4 for cable locations.
18. Go to “Completing the installation” on page 29.
Chapter 2. Replacing hardware 13