MSI MS-5191 Manual page 21

2.3-1 Power Switch
Connect to a 2-pin push button switch. This switch has the same function
with JRMS1.
2.3-2 Reset Switch
Reset switch is used to reboot the system rather than turning the power ON/
OFF. Avoid rebooting while the HDD LED is lit. You can connect the
Reset switch from the system case to this pin.
2.3-3 Keylock
Keylock allows you to disable the keyboard for security purposes. You can
connect the keylock to this pin.
2.3-4 Power LED
The Power LED is always lit while the system power is on. You can
connect the Power LED from the system case to this pin.
2.3-5 Speaker
Speaker from the system case is connected to this pin.
2.3-6 HDD LED
HDD LED shows the activity of a hard disk drive. Avoid turning the power
off while the HDD led is lit. You can connect the HDD LED from the
system case to this pin.
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