Asus B150-PRO D3 Technical Manual - Page 16
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4
Onboard LEDs
1.
Standby Power LED
The motherboard comes with a standby power LED that lights
up to indicate that the system is ON, in sleep mode, or in
soft-off mode. This is a reminder that you should shut down
the system and unplug the power cable before removing or
plugging in any motherboard component. The illustration
below shows the location of the onboard LED.
2.
Hard Disk LED (HD_LED)
The Hard Disk LED is designed to indicate the hard disk activity. It blinks when data
is being written into or read from the hard disk drive. The LED does not light up when
there is no hard disk drive connected to the motherboard or when the hard disk drive
does not function.
3.
Q LEDs (BOOT_DEVICE_LED, VGA_LED, DRAM_LED, CPU_LED)
Q LEDs check key components (CPU, DRAM, VGA card, and booting devices) in
sequence during motherboard booting process. If an error is found, the corresponding
LED flashes until the problem is solved. This user-friendly design provides an intuitive
way to locate the root problem within seconds.
4.
KeyBot LED (KEYBOT_LED)
This LED lights up when the KeyBot button is pressed.
5.
USB BIOS Flashback LED (FLBK_LED)
This LED flashes when you press the BIOS Flashback button for BIOS update.
6.
Q-Code LED (Q_CODE)
The Q-Code LED design provides you with a 2-digit error code that displays the system
status.
1-16
SB_PWR
ON
OFF
Standby Power
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Motherboard Pin Definition