MSI PRO Z790-A WIFI - Onboard LEDs; EZ Debug LED; EZ LED Control (LED_SW1)

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EZ Debug LED
These LEDs indicate the debug status of the motherboard.
Onboard LEDs
LED_SW1: EZ LED Control
This switch is used to switch on/ off all the LEDs of motherboard.
LED_SW1
LED_OFF
LED_ON
(Default)
CPU - indicates CPU is not detected or fail.
DRAM - indicates DRAM is not detected or fail.
VGA - indicates GPU is not detected or fail.
BOOT - indicates the booting device is not detected or fail.