IBM BladeCenter HS21 Series Problem Determination And Service Manual page 21

Activity LED: When this green LED is lit, it indicates that there is activity on the
hard disk drive or network.
Location LED: When this blue LED is lit, it has been turned on by the system
administrator to aid in visually locating the blade server. The location LED on the
BladeCenter unit is lit also. The location LED can be turned off through the
management-module Web interface or through IBM Director Console.
Information LED: When this amber LED is lit, it indicates that information about a
system error for the blade server has been placed in the management-module
event log. The information LED can be turned off through the management-module
Web interface or through IBM Director Console.
Blade-error LED: When this amber LED is lit, it indicates that a system error has
occurred in the blade server. The blade-error LED will turn off only after the error is
corrected.
Media-tray select button: Press this button to associate the shared BladeCenter
unit media tray (removable-media drives and front-panel USB ports) with the blade
server. The LED on the button flashes while the request is being processed, and
then is lit when the ownership of the media tray has been transferred to the blade
server. It can take approximately 20 seconds for the operating system in the blade
server to recognize the media tray.
If there is no response when you press the media-tray select button, you can use
the management-module Web interface to determine whether local control has been
disabled on the blade server.
Note: The operating system in the blade server must provide USB support for the
blade server to recognize and use the removable-media drives and front-panel USB
ports.
Power-control button: This button is behind the control panel door. Press this
button to turn on or turn off the blade server.
Note: The power-control button has effect only if local power control is enabled for
the blade server. Local power control is enabled and disabled through the
management-module Web interface.
Power-on LED: This green LED indicates the power status of the blade server in
the following manner:
v Flashing rapidly: The service processor (BMC) on the blade server is
communicating with the management module.
v Flashing slowly: The blade server has power but is not turned on.
v Lit continuously: The blade server has power and is turned on.
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Chapter 1. Introduction