Lenovo ThinkSystem SR860 Maintenance Manual Download

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1. Power off the server.

2. Make sure that the server is cabled correctly.

3. Remove or disconnect the following devices, one at a time, until you find the failure. Power on and

configure the server each time you remove or disconnect a device.
•  Any external devices,
•  Surge-suppressor device (on the server).
•  Printer, mouse, and non-Lenovo devices.
•  Each adapter.
•  Hard disk drives.
•  Memory modules until you reach the minimum configuration that is supported for the server.

Note:

The minimum configuration required for the server to start is two processors and two 8 GB

DIMMs.

4. Power on the server.

If the problem is solved when you remove an adapter from the server, but the problem recurs when you
install the same adapter again, suspect the adapter. If the problem recurs when you replace the adapter with
a different one, try a different PCIe slot.

If the problem appears to be a networking problem and the server passes all system tests, suspect a network
cabling problem that is external to the server.

Resolving suspected power problems

Power problems can be difficult to solve. For example, a short circuit can exist anywhere on any of the power
distribution buses. Usually, a short circuit will cause the power subsystem to shut down because of an
overcurrent condition.

Complete the following steps to diagnose and resolve a suspected power problem.

Step 1. Check the event log and resolve any errors related to the power.

Note:

Start with the event log of the application that is managing the server. For more information

about event logs, see “Event logs” on page 167

Step 2. Check for short circuits, for example, if a loose screw is causing a short circuit on a circuit board.

Step 3. Remove the adapters and disconnect the cables and power cords to all internal and external

devices until the server is at the minimum configuration that is required for the server to start. See
“Specifications” on page 1 to determine the minimum configuration for your server.

Step 4. Reconnect all ac power cords and turn on the server. If the server starts successfully, reseat the

adapters and devices one at a time until the problem is isolated.

If the server does not start from the minimum configuration, see “Power supply LEDs” on page 170 to
replace the components in the minimum configuration one at a time until the problem is isolated.

Resolving suspected Ethernet controller problems

The method that you use to test the Ethernet controller depends on which operating system you are using.
See the operating-system documentation for information about Ethernet controllers, and see the Ethernet
controller device-driver readme file.

Complete the following steps to attempt to resolve suspected problems with the Ethernet controller.

Step 1. Make sure that the correct device drivers, which come with the server are installed and that they

are at the latest level.

Step 2. Make sure that the Ethernet cable is installed correctly.

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ThinkSystem SR860 Maintenance Manual