What are the EZ Debug LED indicators and what do they mean?
The motherboard has four EZ Debug LEDs that indicate specific system issues: CPU LED indicates the CPU is not detected or has failed, DRAM LED indicates memory is not detected or has failed, VGA LED indicates GPU/PCIe/M.2 device is not detected or has failed, and BOOT LED indicates the booting device is not detected or has failed. These LEDs help diagnose startup problems.
From the official Msi B550M Pro VDH WiFi Motherboard manual, page 41
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