IBM BladeCenter HT 8740 Problem Determination And Service Manual page 33

v Power module error LED: When this amber LED is lit, a power module failure
has occurred, and it is not operating within specifications.
v Fan error LED: When this amber LED is lit, a fan pack has failed and is not
operating within specifications.
v Output power LED: When this green LED is lit, the output from the power
module to the other components and blade servers is present and within
specifications. During typical operation, both the input power and output power
LEDs are lit.
Media tray: The media tray contains the following:
v LED panel
The LEDs on the LED panel provide status information for your BladeCenter HT
unit.
Note: You can turn off the location LED and the information LED through the
management module.
– Power-on: When this green LED is lit, power is present in the BladeCenter
HT unit. When this LED is off, the power subsystem, the power module, or the
LED has failed.
Attention: If the power-on LED is off, it does not mean that electrical
current is not present in the BladeCenter HT unit. The LED might be
defective. To remove all electrical current from the BladeCenter HT unit, you
must disconnect all power cords from all power input connectors.
– Location: When this blue LED is lit or flashing, it has been turned on by the
system administrator to aid in visually locating the BladeCenter HT unit. If a
blade server requires attention, the location LED on the blade server usually
will also be lit. After the BladeCenter HT unit has been located, you can have
the system administrator turn off the location LED.
– Critical system fault: When this LED is lit, the BladeCenter HT unit has a
critical system fault. A critical system fault is an error or event that is detected
by the system with a significant impact to the system. In this case, the system
cannot continue to operate or is operating in a non-redundant power
configuration or a non-redundant cooling configuration.
Note: The color of this LED can be set to amber or red through the
management module.
– Major system fault: When this LED is lit, the BladeCenter HT unit has a
major system fault. The system can continue to operate but might lose some
function and performance.
Note: The color of this LED can be set to amber or red through the
management module.
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Chapter 1. Introduction