Acer Altos R520 M2 Series User Manual page 74

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(2) Pull the heat sink away from the processor.
(3) Lay down the heat sink in an upright position — with the
thermal patch facing upward. Do not let the thermal patch
touch the work surface.
(4) Use an alcohol prep pad to wipe off the thermal grease from
both the heat sink and the processor socket retention plate.
4 Remove the default processor.
Warning! The processor becomes very hot when the system
is on. Allow it to cool off first before handling.
(1) Release then lift the load lever.
(2) Open the retention plate to expose the socket body.
3 System upgrade