Gateway M460 Service Manual page 21

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Remove the old processor from the system board.
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Install the new processor onto the system board making sure that Pin 1
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on the processor (indicated by the silk-screened arrow on the corner of
the processor) aligns with Pin 1 on the processor socket (indicated by the
absence of a pin hole in the processor socket), then use a flat-blade
screwdriver to turn the processor lock screw 1/4-turn clockwise.
Place the thermal grease on the processor. Use only enough to cover the
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CPU die.
Remove any thermal grease residue from the cooling assembly using a
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soft cloth and isopropyl alcohol.
Reassemble the notebook.
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Replacing the processor
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