104 IBM NeXtScale System Planning and Implementation Guide
To aid with problem determination, the server includes light path diagnostic
indicators, which is a set of LEDs on the front of the server and inside the server
that shows you which component is failing. The LEDs are shown in Figure 4-20.
Figure 4-20 IBM NeXtScale nx360 M4 operator panel
The LEDs are defined as follows:
Power button (green): Determines the following power state of the serve:
– Off: AC power is not present.
– On: Server is powered-on.
– Flashing rapidly (four times per second): Server is powered-off and is not
ready to be turned on.
– Flashing slowly (once per second): Server is powered-off and is ready to
be turned on.
– Fading on and off: Server is in a reduced power state. To wake up the
server, press the power button or use the web interface of the integrated
IMM, which is only available with some specific configurations.
Locator LED (blue): Location LED controllable by the integrated IMM. This
LED is useful to physically identify a system from the management software
for maintenance purposes.
Check log LED (yellow): Indicates that a condition that causes an event to be
logged did occur.
System error LED (yellow): Indicates that a fault was detected by the
integrated management module (IMM).
When an error occurs, the System error LED lights up. Review the logs
through the web interface of the IMMv2 (see 4.15, “Remote server
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