Asus RS720-E9-RS12-E - Page 94

Chapter 4: Motherboard Information
4-12
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.