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1.5 Motherboard overview
1.5.1 Placement direction
When installing the motherboard, ensure that you place it into the chassis in the correct
orientation. The edge with external ports goes to the rear part of the chassis as indicated in
the image below.
1.5.2 Screw holes
Place eight (8) screws into the holes indicated by circles to secure the motherboard to the
chassis.
Do not overtighten the screws! Doing so can damage the motherboard.
Place this side towards
the rear of the chassis.
Onboard LED
The motherboard comes with a
standby power LED that lights up
to indicate that the system is ON,
in sleep mode, or in soft-off mode.
This is a reminder that you should
shut down the system and unplug
the power cable before removing
or plugging in any motherboard
component. The illustration below
shows the location of the onboard
LED.
M3N78-CM
R
M3N78-CM Onboard LED
SB_PWR
ON
Standby
Power
OFF
Powered
Off
M3N78-CM
Chapter 1: Product introduction 1-5