IBM BladeCenter JS12, Problem Determination And Service Manual

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Blade server control panel buttons and LEDs
Blade server control panel buttons and LEDs provide operational controls and
status indicators.
Note: Figure 1 shows the control-panel door in the closed (normal) position. To
access the power-control button, you must open the control-panel door.
Keyboard/video select button: When you use an operating system that supports a
local console and keyboard, press this button to associate the shared BladeCenter
unit keyboard and video ports with the blade server.
Notes:
v
The operating system in the blade server must provide USB support for the
blade server to recognize and use the keyboard, even if the keyboard has a
PS/2-style connector.
v The keyboard and video are available after partition firmware loads and is
running. Power-on self-test (POST) codes and diagnostics are not supported
using the keyboard and video. Use the management module to view
checkpoints.
The LED on this button flashes while the request is being processed, then is lit
when the ownership of the keyboard and video has been transferred to the blade
server. It can take approximately 20 seconds to switch control of the keyboard and
video to the blade server.
Using a keyboard that is directly attached to the management module, you can
press keys in the following sequence to switch keyboard and video control
between blade servers:
NumLock NumLock blade_server_number Enter
MT
Keyboard/video select button
Media-tray select button
Information LED
Blade-error LED
Power-control button
NMI reset
Activity LED
Location LED
Power-on LED
Sleep (not used on
blade server)
Figure 1. Blade server control panel buttons and LEDs
Chapter 1. Introduction
5