Power Led; System Leds - HP Visualize c160 Owner's Manual

Product Information
System Unit Front Panel Controls

Power LED

The power LED is located on the left side of the front panel on the disk tray.
It lights when the system unit power is on and flashes until the OS is booted.
Once the OS is booted, the LED remains on without flashing, indicating that
a soft shutdown is enabled.

System LEDs

The Model C160/C180/C200 workstations have four diagnostic LEDs
located next to the system power LED.
For more information on the error codes displayed by the diagnostic LEDs,
see "LED Error Codes" in the chapter, "Solving Problems".
6
LED 4 - System Heartbeat
LED 3 - SCSI Bus Activity
LED 2 - Network Transmit
LED 1 - Network Receive