IBM HS40 - BladeCenter - 8839, Maintenance And Troubleshooting Manual

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Controls and LEDs
This section describes the controls and light-emitting diodes (LEDs) on the blade
server. You must open the door to access the controls and LEDs.
Note: The control panel door is shown in the closed (normal) position in this
illustration. You must open the control panel door to access the
power-control button.
Blade-error
LED
Information
LED
Location
LED
Activity
LED
Power-on
LED
CD/diskette/USB
select button
CD
Keyboard/ mouse/
video select button
Power-control button
CD/diskette/USB select button: Press this button to associate the CD-ROM drive,
diskette drive, and USB port with this blade server. The LED on this button flashes
while the request is being processed, then is steady when the ownership of the
CD-ROM drive, diskette drive, and USB port has been transferred to this blade
server. It can take approximately 20 seconds for the operating system in this blade
server to recognize the CD-ROM drive, diskette drive, and USB port.
The operating system in the blade server must provide USB support for the blade
server to recognize and use the CD-ROM drive, diskette drive, and USB port. The
BladeCenter unit uses USB for internal communication with these devices. If there
is no response when you press the CD/diskette/USB select button, you can use the
management-module Web interface to see whether local control has been disabled
on the blade server.
Keyboard/mouse/video select button: Press this button to associate the keyboard
port, mouse port, and video port with this blade server. The LED on this button
flashes while the request is being processed, then is steady when the ownership of
the keyboard, mouse, and video has been transferred to this blade server. It can
take up to 20 seconds to switch the keyboard, video, and mouse control to the
blade server.
Although the keyboard that is attached to the BladeCenter unit is a PS/2
®
-style
keyboard, communication with it is through the Universal Serial Bus (USB). The
operating system in the blade server must provide USB support for the blade server
to recognize and use the keyboard and mouse. The BladeCenter unit uses USB for
internal communication with these devices. When you are running an operating
system that does not have USB device drivers, the keyboard responds very slowly.
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BladeCenter HS40 Type 8839: Hardware Maintenance Manual and Troubleshooting Guide