Troubleshooting With Diagnostic Tools
AC Power Connection
The AC power cords are the direct connection between the server power supplies and the power
sources. The server power supplies need separate stable AC circuits. Insufficient voltage levels
or fluctuations in power can cause server power problems. The power supplies are designed
to operate at a particular voltage and within an acceptable range of voltage fluctuations (see
Sun Server X4-8 Installation Guide
Action
: Check that the AC power cords are connected to the server. Check that the correct
power is present at the outlets and monitor the power to verify that it is within the acceptable
range. You can verify sufficient AC power by checking the green AC OK indicators next
to the AC inlets on the back of the server. When the indicators are lit, the AC power to the
server is sufficient. An amber indicator indicates that the AC power is insufficient. You can
also verify proper connection and operation by checking the PSU indicator panels, which are
located at the front of the server on the PSUs. Lit green AC OK and DC OK indicators show a
properly functioning PSU. An amber AC OK indicator indicates that the AC power to the PSU
is insufficient.
Prevention
: Use the AC power cord retaining clips and position the cords to minimize the risk
of accidental disconnection. Ensure that the AC circuits that supply power to the server are
stable and not overburdened.
Power Supplies (PSUs)
The server power supplies (PSUs) provide the necessary server voltages from the AC power
outlets. If the PSUs are inoperable, unplugged, or disengaged from the internal connectors, the
server cannot power on.
Action
: Check that the AC cables are connected to both PSUs. Check that the PSUs are
operational (the PSU indicator panel should have a lit green AC OK indicator). Ensure that the
PSU is properly installed. A PSU that is not fully engaged with its internal connector does not
have power applied and does not have a lit green AC OK indicator.
Prevention
: When a power supply fails, replace it immediately. When installing a power
supply, ensure that it is fully seated and engaged with its connector inside the drive bay. A
properly installed PSU, has a lit green AC OK indicator.
Troubleshooting With Diagnostic Tools
The server and its accompanying software and firmware contain diagnostic tools and features
that can help you isolate component problems, monitor the status of a functioning system,
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Sun Server X4-8 Service Manual • December 2015
Summary of Contents for SUN X4-8
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Page 237: ...BIOS Setup Utility Screens BIOS Setup Utility 237 ...
Page 245: ...BIOS Setup Utility Screens BIOS Setup Utility 245 ...
Page 247: ...BIOS Setup Utility Screens Memory Configuration BIOS Setup Utility 247 ...
Page 249: ...BIOS Setup Utility Screens Advanced Serial Port Console Redirection BIOS Setup Utility 249 ...
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Page 251: ...BIOS Setup Utility Screens BIOS Setup Utility 251 ...
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Page 253: ...BIOS Setup Utility Screens Advanced Trusted Computing BIOS Setup Utility 253 ...
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Page 255: ...BIOS Setup Utility Screens Advanced Network Stack BIOS Setup Utility 255 ...
Page 257: ...BIOS Setup Utility Screens Advanced BMC Network Configuration BIOS Setup Utility 257 ...
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Page 259: ...BIOS Setup Utility Screens BIOS Setup Utility 259 ...
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