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2. Remove the heat sink. If you have an UMA graphics heat sink, go to step c.
a. Loosen all of the captive screws (1) and (2) and then lift the switchable discrete graphics
heat sink (3) from the system board.
CAUTION: To prevent damage to the cooling tubes, do not lift the assembly by the
cooling tubes. The tubes bend easily.
b. Thoroughly clean the thermal connections (1), (3) on the system board and the heat sink
(2), (4) before replacing a heat sink onto a system board. Continue to step 3.
Component replacement procedures 67