Table 9. Front operator panel LEDs
1 & 8 “System ID button with system ID LED (blue)” on
page 153
4 & 5 “Power button with power status LED (green)” on
page 153
2 & 7 (Reserved)
9 “NMI button” on page 154
3 & 6 “System Error LED (yellow)” on page 153
1 8 System ID button with system ID LED (blue)
Use this system ID button and the blue system ID LED to visually locate the server. Each time you press the
system ID button, the state of the system ID LED changes. The LED can be changed to on, blinking, or off.
You can also use the Lenovo XClarity Controller or a remote management program to change the state of the
system ID LED to assist in visually locating the server among other servers.
• On: System is identified. Press the button once to turn on the LED. Pressing the button a second time will
make the LED blink. Pressing it a third time will turn off this LED.
• OFF: System is not identified.
3 6 System Error LED (yellow)
When this yellow LED is on, it indicates that one or more system errors have occurred.
Status Color Description Action
On
Yellow An error has been detected on the server.
Causes might include one or more of the
following errors:
• The temperature of the server has
reached a non-critical temperature
threshold.
• The voltage of the server has reached a
non-critical voltage threshold.
• A fan has been detected to be running at
low speed.
• A critical error has occurred to the
power supply.
• The power supply is not connected.
Check the Event log to determine the exact
cause of the error.
Off
None The server is off or the server is on and is
working correctly.
None.
4 5 Power button with power status LED (green)
Press this button to turn the server on and off manually. Following are the states of the LED:
Status Color Description
Off
None No power supply is properly installed or connected, or the LED itself has failed.
Flashing rapidly (four
times per second)
Green The server is turned off and not ready to be turned on yet. The power button is
disabled. This will last approximately 5 to 10 seconds after power supply units are
properly installed and connected..
Flashing slowly (once
per second)
Green The server is turned off but ready to be turned on. Press the power button to turn
on the server.
Lit Green The server is turned on.
Chapter 3. Problem determination 153
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