Asus Z170-DELUXE Series - Page 42

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Chapter 1: Product Introduction
Chapter 1
3. EPU LED (OLED2)
The EPU LED lights up when the EPU switch is enabled.
4. USB BIOS Flashback LED (FLBK_LED)
The BIOS Flashback LED ashes when you press the BIOS Flashback button for BIOS
update.