MSI MS-9A08 - Manual (Page 22)

2-4
SYSTEM ASSEMBLY
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Step 1:
Locate the CPU socket on the mainboard.
Step 2:
Turn the socket actuator counterclockwise to open the socket. Locate the golden
arrow on the CPU and align it to the upper right corner of the socket. Put the CPU
gently down. If the socket is completely opened, the CPU pins will securely fit
into the socket.
Step 3:
Turn the socket actuator clockwise to close
the socket.
Important
On the upper end of the CPU socket is a
socket actuator in the form of a slotted
screw head. Make sure that you open or
close the socket with a flathead screwdriver
before and after installing the CPU.