Asus TUF GAMING Z790-PRO WIFI Manual page 34

18. Q-LEDs
The Q-LEDs check key components (CPU, DRAM, VGA, and booting devices) during
the motherboard booting process. If an error is found, the critical component's LED
stays lit up until the problem is solved.
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1-22
DRAM (YELLOW)
BOOT (YELLOW GREEN)
The Q-LEDs provide the most probable cause of an error code as a starting point for
troubleshooting. The actual cause may vary from case to case.
The DRAM LED will detect if the memory modules have been installed in the
recommended memory configuration slots as well as if the memory modules have
been properly installed and seated in the memory slots once the motherboard is
connected to a power supply. After the motherboard has been powered on, the
DRAM LED will return to the original error checking procedure, regardless of the LED
status prior to powering on.
CPU (RED)
VGA (WHITE)
Chapter 1: Product Introduction