What do the Q-LEDs indicate during boot, and what colors should I look for?

The Q-LEDs check key components during the motherboard booting process — if an error is found, the critical component's LED stays lit up until the problem is solved. The four Q-LEDs correspond to: CPU (red), DRAM (yellow), VGA (white), and Boot Device (yellow green). They provide the most probable cause of an error code as a starting point for troubleshooting, though the actual cause may vary from case to case.