Table 20. Components associated with power rail error (continued)
Pwr rail error in the
IMM2 event log Components
Pwr rail 3 error Microprocessor 2
Pwr rail 4 error Fan 4, and DIMMs 1 through 12
Pwr rail 5 error For the hot-swap power-supplie systems: Hard disk drives, hard
disk drive backplane assembly, and optional DVD or Tape drive.
v Replace the identified component.
4. Reconnect all power cords and turn on the server. If the server starts
successfully, replace the adapters and devices one at a time until the problem is
isolated.
5. 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 “Power-supply LEDs” on page 21 for the
minimum configuration.)
6. 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 21 to replace the components in the minimum configuration one at
a time until the problem is isolated.
Solving 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.
Try the following procedures:
v Make sure that the correct device drivers, which come with the server are
installed and that they are at the latest level.
v Make sure that the Ethernet cable is installed correctly.
– The cable must be securely attached at all connections. If the cable is attached
but the problem remains, try a different cable.
– If you set the Ethernet controller to operate at 100 Mbps, you must use
Category 5 cabling.
– If you directly connect two servers (without a hub), or if you are not using a
hub with X ports, use a crossover cable. To determine whether a hub has an X
port, check the port label. If the label contains an X, the hub has an X port.
v Determine whether the hub supports auto-negotiation. If it does not, try
configuring the integrated Ethernet controller manually to match the speed and
duplex mode of the hub.
v Check the Ethernet controller LEDs on the rear panel of the server. These LEDs
indicate whether there is a problem with the connector, cable, or hub.
– The Ethernet link status LED is lit when the Ethernet controller receives a link
pulse from the hub. If the LED is off, there might be a defective connector or
cable or a problem with the hub.
– The Ethernet transmit/receive activity LED is lit when the Ethernet controller
sends or receives data over the Ethernet network. If the Ethernet
transmit/receive activity is off, make sure that the hub and network are
operating and that the correct device drivers are installed.
Chapter 4. Troubleshooting 297
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