Asus X99-A/USB 3.1 - Onboard LEDs and Q-Code Indicators

ASUS X99-A/USB 3.1
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Chapter 1
1.2.8 Onboard LEDs
1. POST State LEDs
The POST State LEDs provide the status of these key components during POST
(Power-On-Self Test): CPU, memory modules, VGA card, and hard disk drives. If an
error is found, the critical component’s LED stays lit up until the problem is solved.
2. TPU LED (TPU_LED)
The TPU LED lights up when the TPU switch is enabled.