Asus X99-E WS User Manual page 37

5. ASUS Dr. Power LED (PGLED3)
This LED near the Dr. Power switch lights up when the Dr. Power switch is enabled.
6. PWR_SUPPLY LED
The ASUS Dr. Power LED near the EATX PWR connector lights up when the ASUS
Dr. Power switch setting is on and the power supply unit has failed.
ASUS X99-E WS
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