Asus ROG MAXIMUS Z790 HERO LGA 1700 ATX Motherboard - Manual (Page 36)

1-22 Chapter 1: Product Introduction
Chapter 1
19. Start button
Press the Start button to power up the system, or put the system into sleep or soft-off
mode (depending on the operating system settings).
The button also lights up when the system is plugged to a power source, indicating
that you should shut down the system and unplug the power cable before removing or
installing any motherboard component.
18. ReTry button
The ReTry button is specially designed for overclockers and is most useful during
the booting process where the Reset button is rendered useless. Press this button
to force the system to reboot while retaining the same settings to be retried in quick
succession to achieve a successful POST.