Asus ESC500 G2 - Manual (Page 49)

3-7 ASUS ESC500 G2
3.3 Onboard LEDs
1. POST State LEDs
The POST State LEDs indicate the status of these key components during
POST (Power-on-Self Test): CPU, memory modules, VGA card, and hard
disk drive. If an error is found, the critical component’s LED stays lit up until
the problem is solved.
2. GPU Boost LED
The GPU Boost LED lights up when the GPU Boost switch is turned to
Enable.