Fan Leds; Multi-Bios Leds; Jpwrled1: Led Light Demonstration Power Input Connector - MSI X299 SLI PLUS Manual

Fan LEDs

These LEDs indicate the fan control mode.

Multi-BIOS LEDs

Multi-BIOS LEDs indicate which BIOS is in operation.

JPWRLED1: LED light demonstration power input connector

This connector is used by retailers to demonstrate onboard LED lights.
48
Onboard LEDs
CPU_FAN1 LED
PUMP_FAN1 LED
BIOS B LED (White)
BIOS A LED (Red)
JPWRLED1 - LED power input
LED Color Fan control mode
Red PWM mode
Green DC mode