Chapter 5
Troubleshooting
Troubleshooting System Power
136
Troubleshooting System Power
This section provides information and procedures for troubleshooting the system power.
Using the Front Panel Power Button
The server power button on the front panel operates differently, depending on how long the button is held in
and on what the system is doing when the button is pressed. You must be aware of its uses to properly
troubleshoot the system.
Table 5-1 shows the power button functions.
Operating System Does Boot
If your operating system is running and you are experiencing problems, use the following online tools to help
solve your problem: (See “Troubleshooting Using Online Support Tools” on page 137.)
• Support Tools Manager (STM)
• Event Monitoring Service (EMS)
•iLO MP
Table 5-1 Power Button Functions
System State Switch Pressed Time Result
Power connected to power
supplies, system power off
One second or less
More than one second
System power on
No effect
System at ISL Less than one second
More than one second but
less than five seconds
More than five seconds
No effect
Not used. This selection initiates E-buzzer
functions that are not supported in the servers
Hard shutdown
System at BCH Less than one second
More than one second but
less than five seconds
More than five seconds
Hard shutdown
Not used. This selection initiates E-buzzer
functions that are not supported in the servers
Hard shutdown
Power on, OS shut down Less than one second
More than one second but
less than five seconds
More than five seconds
No effect
Not used. This selection initiates E-buzzer
functions that are not supported in the servers
Hard shutdown
OS running Less than one second
More than one second but
less than five seconds
More than five seconds
No effect
Not used. This selection initiates E-buzzer
functions that are not supported in the servers
Hard shutdown
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