IBM 88861TU Planning Manual page 20

The BladeCenter S chassis supports a single advanced management module, and it
must be installed in the advanced management module bay.
Advanced management module indicators and controls:
The advanced management module has several LEDs that you can use to obtain
status about the advanced management module and the Ethernet connection.
The following advanced management module LEDs provide status information
about the advanced management module and Ethernet connection:
14
BladeCenter S Type 7779/8886: Planning Guide
Activity LED
Power-on LED
Serial
Console
Ethernet
Release handle
Power-on
LED
Release handle
Error LED
OK
Video
Port link LED
LINK
TX/RX
Port activity LED
USB
MAC
address
Activity
Error
LED
LED
OK
LINK
TX/RX
Reset
Port link LED
Port activity LED