MSI VB9 User Manual page 21

This connector supports the optional wireless transmitting and receiving infrared module.
This module mounts to small opening on system cases that support this feature you must
also configure the setting through BIOS setup. Use the five pins as shown on the Back
View and connect a ribbon cable from the module to the motherboard according to the pin
definitions.
13. USB Port connector: USB
14. FAN connector: CPUFAN , SYSFAN
15. ATX Power button: PS/ON
When using ATX power, the system power can be controlled by a momentary switch
connected to PS-ON Pushing the button once will switch ON/OFF the system. The
system Power LED will shows the status of the system's power.
Selections
One touch Power ON/OFF
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