Asus Motherboard P7P55D - Manual (Page 61)

ASUS P7P55D 2-41
Chapter 2
2.9 Onboard LEDs
1. POST State LEDs
POST State LEDs check key components (CPU, DRAM, VGA card, and HDD) in
sequence during motherboard booting process. If an error is found , the LED next to
the error device will continue lighting until the problem is solved. This user-friendly
design provides an intuitive way to locate the root problem within seconds.
You may disable the POST State LEDs in BIOS. Refer to section 3.8.2 Boot Setting
Configuration for details.
2. 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.