Asus RS700-E9-RS4 User Manual page 90

5. BMC LED (BMCLED1)
The BMC LED lights up to indicate that the on-board BMC is functional.
6. CATT LED (CATTERR1)
The CATT LED indicates that the system has experienced a fatal or catastrophic error
and cannot continue to operate.
4-12 Chapter 4: Motherboard Information