Toshiba Magnia Z300 User Manual

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Installing and Removing Hardware
CPU module
89
NOTE: Lift up the riser card with a screwdriver to remove.
Remove two screws and the fan duct.
Removing the fan duct.
Release the clips that secure the heat sink for the CPU module 
to be removed, and remove the heat sink.
The heat sink is fixed with clips that are engaged with the 
upper and lower hooks of the socket.  To disengage each clip 
from the hook, lightly press the clip.