IBM QS21 Service Guide - Page 24
Blade, server, controls
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Blade server controls and LEDs This section describes the controls and LEDs on the front panel of the blade server. For further information about the LEDs and how they can be used to assist in troubleshooting, see "Problems indicated by the front panel LEDs" on page 52. Location LED Activity LED Information Media-tray LED select button Blade-error LED Power-on Power-control NMI LED CDbutton reset-button Figure 2. Power-control button and LEDS Note: The control panel door which normally covers the LEDs and power-control button is omitted for reasons of clarity. Activity LED: This green LED lights when there is network activity. Location LED: This blue LED is turned on remotely by the system administrator to assist in locating the blade server. The location LED on the BladeCenter unit lights at the same time. Information LED: This amber LED lights to indicate that information about a system error has been placed in the Advanced Management Module Event Log. The information LED remains on until turned off by Advanced Management Module or through IBM Director Console. Blade error LED: This amber LED lights when a system error has occurred in the blade server. Power control button: Press this button to turn the blade server on or off. The power control button only has effect if local power control is enabled for the blade server. Local power control is enabled and disabled through the BladeCenter Advanced Management Module Web interface. Media tray select button: This button associates the shared BladeCenter unit media tray (DVD/CD drive and USB ports) with the blade server. The LED on the button flashes while the request is being processed, then lights when the ownership of the media tray has been transferred to the blade server. It can take approximately 20 seconds for the operating system on the blade server to recognize the media tray. 6 BladeCenter QS21 Type 0792: Problem Determination and Service Guide