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).
System-error LED: When this amber LED is lit, it indicates that a system error has occurred. Use the diagnostic LED panel and the system service label on the inside of the left-side cover to further isolate the error. See the Problem Determination and Service Guide on the IBM System x Documentation CD for additional information.
USB 2 connector: Connect a USB device to this connector.
USB 1 connector: Connect a USB device to this connector.
DVD-eject button: Press this button to release a CD or DVD from the DVD drive.
Hard disk drive status LED: When this LED is lit, it indicates that the associated hard disk drive has failed. If an optional RAID adapter is installed in the server and the LED flashes slowly (one flash per second), the drive is being rebuilt. If the LED flashes rapidly (three flashes per second), the controller is identifying the drive.
Hard disk drive activity LED: When this LED is flashing, it indicates that the drive is in use.
DVD drive activity LED: When this LED is lit, it indicates that the DVD drive is in use.
36IBM System x3500 Type 7977: Installation Guide
