Table 17. Components associated with power rail errors (continued)Pwr rail error in the IMM event log ComponentsPwr rail 4 error v PCI adapter power cable (if one is installed)v Fan 1v Fan 2v Hard disk drivesv DIMMs 7 through 12Pwr rail 5 error v DVD drive (if one is installed)v Fan 3v Fan 4v Hard disk drivesv DIMMs 13 through 18Pwr rail 6 error v Optional adapter (if one is installed) in PCIriser-card assembly 2v PCI riser-card assembly 2v Dual-port network adapter (if one is installed)v Fan 5v Fan 6v DIMMs 19 through 24d. Replace the identified component.5. Remove the adapters and disconnect the cables and power cords to all internaland external devices until the server is at the minimum configuration that isrequired for the server to start (see “Power-supply LEDs” on page 141 for theminimum configuration).6. Reconnect all power cords and turn on the server. If the server startssuccessfully, reseat the adapters and devices one at a time until the problem isisolated.ResultsIf the server does not start from the minimum configuration, see “Power-supplyLEDs” on page 141 to replace the components in the minimum configuration oneat a time until the problem is isolated.Solving Ethernet controller problemsThe method that you use to test the Ethernet controller depends on whichoperating system you are using. See the operating-system documentation forinformation about Ethernet controllers, and see the Ethernet controllerdevice-driver readme file.About this taskTry the following procedures:Procedurev Make sure that the correct device drivers, which come with the server areinstalled and that they are at the latest level.v Make sure that the Ethernet cable is installed correctly.176 IBM System x3550 M4 Type 7914: Installation and Service Guide
