Troubleshooting Power Issues
If your server does not power on, use the information in the following table to troubleshoot the issue.
Power Issue | Description | Action | Prevention |
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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 operate at a particular voltage and within an acceptable range of voltage fluctuations. Refer to Electrical Requirements in Oracle Servers X9-2 and X9-2L Installation Guide at Oracle Server X9-2L Documentation. |
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Use the AC power cord Velcro 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 supply units (PSUs) provide the necessary server voltages from the AC power outlets. If the power supplies are inoperable, unplugged, or disengaged from the internal connectors, the server cannot power on. Note: Use the Velcro straps on the back of the server to secure the power cord connectors to the back of the power supplies. The Velcro retaining straps minimize the risk of accidental disconnection. |
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When a power supply fails, replace it immediately. To ensure redundancy, the server has two power supplies. This redundant configuration prevents server downtime, or an unexpected shutdown, due to a failed power supply. The redundancy allows the server to continue to operate if one of the power supplies fails. However, when a server is being powered by a single power supply, the redundancy no longer exists, and the risk for downtime or an unexpected shutdown increases. When installing a power supply, ensure that it is fully seated and engaged with its connector inside the drive bay. A properly installed power supply has a lit green AC OK indicator. |
Top Cover |
The server top cover maintains the air pressures inside the server, prevents accidental exposure to hazardous voltages, and protects internal components from physical and environmental damage. |
Do not operate the server without the top cover installed unless you are hot-plugging a fan module, and then ensure that you complete the operation and replace the cover within 60 seconds. See Servicing Fan Modules and Install the Server Top Cover. |
Be careful to avoid bending or otherwise warping the top cover. |