IBM x3500 User Guide - Page 22
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UPC - 883436005760
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Front view The following illustration shows the controls and LEDs on the front of the server. Note: The front bezel door is not shown so that the drive bays are visible. System power LED Power-control button Hard disk drive activity LED System locator LED System-information LED System-error LED DVD drive activity LED (green) USB 2 USB 1 DVD-eject button Hard disk drive status LED (amber) Hard disk drive activity LED (green) System Power-on LED: When this 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 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. Power-control button: Press this button to turn the server on and off manually. A power-control-button shield comes with the server. You can install this disk-shaped shield to prevent the server from being turned off accidentally. Hard disk drive activity LED: When this LED is flashing, it indicates that a hard disk drive is in use. System locator LED: Use this LED to visually locate the server among other servers. You can use IBM Director to light this LED remotely. System-information LED: When this amber LED is on, the server power supplies are nonredundant, or some other noncritical event has occurred. The event is recorded in the error log. Check the light path diagnostic panel for more information (see the Problem Determination and Service Guide on the IBM System x Documentation CD). 8 IBM System x3500 Type 7977: User's Guide