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Starting and Stopping the System
System Does Not Appear to Be Powered On
If AC power is being supplied to the server and the fans are turning but the server still
does not appear to be powered, the server might be running internal tests. Wait
several minutes (at least 10 minutes for large configurations). If the server is still not
powered on after this time and you cannot determine the cause of the problem:
Check your site's circuit breakers.
Plug in another device into the PDU that powers the LSU to check the power for
that PDU.
Green LED Is Not Lit After POSTs Finish
It can take several minutes for the green LEDs on all system components to light:
1. Wait for the POSTs to finish. It might take as long as 10 minutes for all system
components.
2. If the green LEDs still do not light:
a. Check that AC power cords and component power cords are properly
connected.
b. If one green LED still does not light, a system component might have failed its
POST.
3. If you cannot determine the cause of the problem, contact your service provider.
Amber LED on a Component Remains Lit After the POST
Finishes
A fault might have been detected, or the component might not have been successfully
initialized and configured. Contact your service provider.
Components Fail When Testing the Power
If a component fails when testing the power, the possible causes are listed in
descending order of probability:
The component is plugged in improperly.
Check the connection between each component power cord and PDU, and check
the AC power receptacle to which the server power cord is connected. If
necessary, unplug and plug each cord in again to ensure that it is seated properly.
A power cord is defective.
A component power supply is defective.
A fuse is defective.
The UPS, if installed, is not fully charged.
HP Integrity NonStop NS-Series Operations Guide —529869-005
System Does Not Appear to Be Powered On
15 -19
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