IBM BladeCenter T Series Installation Manual page 37

System-status LEDs: These LEDs provide status information for the
BladeCenter T unit.
v Power: When continuously lit, this green LED indicates the presence of
power in the BladeCenter T unit. The LED turns off when the power source
is interrupted.
Attention: If the power LED is off, it does not mean electrical power is not
present in the BladeCenter T unit. The LED might be burned out. To remove
all electrical power from the BladeCenter T unit, you must disconnect all
power cords from all power modules.
v Location: This blue LED is for system identification. A system administrator
or servicer uses this LED to locate a specific BladeCenter T unit for service
or repair. You can turn off the location LED through the Web interface or a
remote management console.
Alarm LEDs: These LEDs provide alarm notifications for the BladeCenter T
unit.
v CRT (Critical alarm, amber (default) or red): When continuously lit, this
LED indicates the presence of a critical system fault. The system comes with
amber as the default. See the BladeCenter T Management Module User's Guide
for information on setting the color of this LED.
A critical system fault is an error or event that is unrecoverable. In this case,
the system cannot continue to operate. An example is the loss of a large
section of memory that causes the system to be incapable of operating.
v MJR (Major alarm, amber (default) or red): When continuously lit, this LED
indicates the presence of a major system fault. The system comes with amber
as the default. See the BladeCenter T Management Module User's Guide for
information on setting the color of this LED.
A major system fault is an error or event that has a discernible impact to
system operation. In this case, the system can continue to operate but with
reduced performance. An example is the loss of one of two mirrored disks.
v MNR (Minor alarm, amber): When continuously lit, this LED indicates the
presence of a minor system fault. A minor system fault is an error or event
that has little impact to system operation. An example is a correctable ECC
error.
Chapter 3. Management, KVM, and LAN module LEDs and external ports
23