IBM 79788BU User Manual page 25

The following controls and LEDs are on the operator information panel:
– Power-on LED: When this green LED is lit and not flashing, it indicates that
the server is turned on. When this LED is flashing, it indicates that the server
is turned off and is still connected to an ac power source. When this LED is
off, it indicates that ac power is not present, or the power supply or the LED
itself has failed. A power LED is also on the rear of the server.
Note: If this LED is off, it does not mean that there is no electrical power in
the server. The LED might be burned out. To remove all electrical
power from the server, you must disconnect the power cord from the
electrical outlet.
– System-locator LED: Use this blue LED to visually locate the server among
other servers. You can use IBM Director to light this LED remotely. This LED
is controlled by the BMC.
– System-error LED: When this amber LED is lit, it indicates that a system
error has occurred. A system-error LED is also on the rear of the server. An
LED on the light path diagnostics panel on the system board is also lit to help
isolate the error. This LED is controlled by the BMC.
– Release latch: Press the release latch to the left to slide out the operator
information panel and view the light path diagnostics LEDs and buttons. See
the Problem Determination and Service Guide for more information about the
light path diagnostics panel.
– System-information LED: When this amber LED is lit, it indicates that a
noncritical event has occurred. Check the error log for additional information.
See the information about light path diagnostics in the Problem Determination
and Service Guide for more information about error logs.
– Hard drive activity LED: When this green LED is lit, it indicates that one of
the hard disk drives is in use.
Notes:
1. For a SAS drive, a hard disk drive activity LED is shown in two places: on
the hard disk drive and on the operator information panel.
2. For a SATA drive, hard disk drive activity is indicated only by the hard disk
drive activity LED on the operator information panel.
– Power-control button: Press this button to turn the server on and off
manually.
v Rack release latches: Press the latches on each front side of the server to
remove the server from the rack.
v Video connector: Connect a monitor to this connector. The video connectors on
the front and rear of the server can be used simultaneously.
v USB connectors: Connect a USB device, such as a USB mouse, keyboard, or
other device to any of these connectors.
v CD-RW/DVD eject button: Press this button to release a DVD or CD from the
CD/DVD drive.
v CD-RW/DVD drive activity LED: When this LED is lit, it indicates that the
CD-RW/DVD drive is in use.
v Hard disk drive status LED: This LED is used on SAS hard disk drives. When
this LED is lit, it indicates that the drive has failed. If an optional IBM ServeRAID
controller is installed in the server, when this LED is flashing slowly (one flash
per second), it indicates that the drive is being rebuilt. When the LED is flashing
rapidly (three flashes per second), it indicates that the controller is identifying the
drive.
Chapter 1. The System x3550 Type 7978 server
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