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Step 6
Connect Front Panel Switches/LEDs/Speaker
You can find there are several different cables already existing in the system
case and originating from the computer’s front-panel devices (HDD LED,
Power LED, Reset Switch, PC Speaker, etc.) These cables serve to connect
the front-panel switches and LEDs and USB connectors to the mainboard’s
front-panel connectors group, (J12 and J2) as shown below.
1. ATX Soft Power On/Off
2. SMI
(Hardware System Management Interface)