Status Color
Description
Off None
Power is not present, or the power supply has failed.
Fast blinking (about
four flashes per
second)
Green
• The server is off, but the XClarity Controller is initializing, and the server is not
ready to be powered on.
• System-board-assembly power has failed.
Slow blinking (about
one flash per second)
Green
The server is off and is ready to be powered on (standby state).
Solid on Green
The server is on and running.
3 System ID button/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.
4 System error LED (yellow)
The system error LED helps you to determine if there are any system errors.
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 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.
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.
Power supply LEDs
This topic provides information about various power supply LED status and corresponding action
suggestions.
The following minimal configuration is required for the server to start:
• Two processors in socket 1 and 2
• Two DRAM memory modules in slots 10 and 26
• Two power supply units
• Six system fans
• One 2.5-inch drive, one M.2 drive, or one 7mm drive (if OS is needed for debugging)
38 ThinkSystem SR850 V3 System Configuration Guide
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