Replacing the Processor | 57Postrequisites1 Replace the processor heat-sink. See "Replacing the Processor Heat-Sink" onpage 54.2 Replace the system-board shield. See "Replacing the System-Board Shield" onpage 32.3 Replace the back cover. See "Replacing the Back Cover" on page 18.4 Follow the instructions in "After Working Inside Your Computer" on page 13.