Chapter 3
Troubleshooting
Troubleshooting Using LEDs
74
Troubleshooting Using LEDs
If you suspect a hardware failure during installation, the power and system LEDs, located on the front
control panel, will help you identify the problem. The following sections describe their functions. You may
want to back up your data or replace a component before it fails.
The boot process will be monitored by the MP. With the current MP functionality, the four diagnostic LEDs
are disabled (always off). You can monitor server operation from a console using the MP.
Figure 3-1 Control Panel LEDs
Power and System LEDs
The Power and System LEDs indicate the state of the system. When the system LED is blinking yellow or
red, a problem exists.
Table 3-2 System LED States
System LED State
Off AC power off if Power LED is off
Solid green Running OS
Blinking green Booting or running BCH
Blinking yellow (1/sec.) Attention:
Alerts of levels 3–5 detected in the MP logs
The LED will turn off once the event log has been read
Blinking red (2/sec.) Fault:
System Alert 7 detected, LED will blink until the problem is resolved
and the system boots successfully
Fatal hardware error detected by BMC, LED will blink until problem is
corrected
1 2 3 4 LAN System
System
LED
Power
On/Off LED
Power Button
Diagnostics LEDs
(Disabled)
Locator Button and LED
LAN
LED
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