Acer Altos G540 M2 - Manual (Page 81)

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(3) Grasp the processor by its edges and lift it out of its socket.
6 Store the old processor inside an anti-static bag.
7 Remove the new processor from its protective packaging.
8 Install the new processor.
(1) Hold the processor by its edges, then insert it in the socket.
Make sure that the alignment tabs on the socket fit the two
notch located on the edge of the processor. The pins are
keyed in such a way that you cannot install the processor in
the wrong orientation without bending the pins.
(2) Close the retention plate.