Lenovo ThinkEdge SE455 V3 User Manual page 281

/ Network activity LED (green)
2 8
When this LED is flashing, it indicates that the server is transmitting to or receiving signals from the Ethernet
LAN.
System ID LED (blue) /
3
Use the 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.
/ System Error LED (yellow)
4 10
The system error LED helps you to determine if there are any system errors.
Status Color
Yellow
On
Off None
Security LED (green)
6
The states of security LED are as following:
Solid on: The server is operating with security feature enabled.
Blinking: The server is in System Lockdown Mode. Activate or unlock the system for operation. See
"Activate or unlock the system" on page
Off: No security feature is enabled on the server.
NMI button
7
Press this button to force a nonmaskable interrupt to the processor. You might have to use a pen or the end
of a straightened paper clip to press the button. You can also use it to force a blue-screen memory dump.
Use this button only when you are directed to do so by Lenovo Support.
System ID button with system ID LED (blue)
9
Description
An error has been detected on the server.
Causes might include one or more of the
following errors:
• The temperature of the server reached
the non-critical temperature threshold.
• The voltage of the server reached the
non-critical voltage threshold.
• A fan has been detected to be running at
low speed.
• The power supply has a critical error.
• The power supply is not connected to
the power.
The server is off or the server is on and is
working correctly.
255.
Action
Check the Event log to determine the exact
cause of the error.
None.
.
Chapter 8 Problem determination 273