What do the EZ Debug LEDs indicate?
The EZ Debug LEDs indicate the following: CPU LED indicates CPU is not detected or fail, DRAM LED indicates DRAM is not detected or fail, VGA LED indicates GPU/PCIE/M.2 device is not detected or fail, and BOOT LED indicates the booting device is not detected or fail. (Page 42)
From the official Msi B550-A Pro Motherboard manual, page 42
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