1-13 a.b Unscrew only the Phillips-head screw on the metal shielding and remove the metal shielding.
Step 2: Installing the CPU
2-1 a.b.c.d Unlock the CPU heat sink diagonally or according to “1-2-3-4” shown on the CPU heat sink.
!!! Improper unlocking or locking of the CPU heat sink nuts will damage the CPU!!!
2-2 Unplug the CPU fan.