Asus Z87-PRO(V EDITION) - Manual (Page 48)

1-32 Chapter 1: Product introduction
Chapter 1
3. EPU LED
The EPU LED lights up when the EPU switch is enabled.
4. Q-Code LED
The Q-Code LED design provides you with a 2-digi error code that displays the system
status. Refer to the Q-Code table on the next page for details.