Asus RS540-E9-RS36-E User Manual page 70

5. BMC LED (BMCLED1)
The BMC LED blinks to indicate that the on-board BMC is functional.
6. CATERR1 LED (CATERR1)
The CATERR1 LED indicates that the system has experienced a fatal or catastrophic
error and cannot continue to operate.
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Chapter 4: Motherboard Information