6. Connect the power cord to the server and check if the IMM is recovered.System-event logThis topic provides information about the types of messages contained in thesystem-event log.The system-event log contains messages of three types:InformationInformation messages do not require action; they record significantsystem-level events, such as when the server is started.WarningWarning messages do not require immediate action; they indicate possibleproblems, such as when the recommended maximum ambient temperatureis exceeded.Error Error messages might require action; they indicate system errors, such aswhen a fan is not detected.Each message contains date and time information, and it indicates the source of themessage (POST or the IMM).Solving Ethernet controller problemsThis topic provides troubleshooting procedures to try when solving Ethernetcontroller problems.The method that you use to test the Ethernet controller depends on whichoperating system and which switch you are using. See the operating-system andswitch documentation for information about Ethernet controllers, and see theEthernet controller device-driver readme file.Try the following procedures:v 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.– The cable must be securely attached at all connections. If the cable is attachedbut the problem remains, try a different cable.– If the Ethernet controller is set to operate at 100 Mbps, you must useCategory 5 cabling.v Determine whether the switch supports auto-negotiation. For auto-negotiationproblem determination procedures, see the switch documentation. If the switchdoes not support auto-negotiation, try configuring the integrated Ethernetcontroller manually to match the speed and duplex mode of the switch.v Check the Ethernet controller LEDs on the rear panel of the server. These LEDsindicate whether there is a problem with the connector, cable, or switch.– The Ethernet link status LED is lit when the Ethernet controller receives a linkpulse from the switch. If the LED is off, there might be a defective connectoror cable or a problem with the switch.– The Ethernet transmit/receive activity LED is lit when the Ethernet controllersends or receives data over the Ethernet network. If the Ethernettransmit/receive activity light is off, make sure that the switch and networkare operating and that the correct device drivers are installed.76 IBM System x3850 X5 and x3950 X5 Types 7145, 7146, 7143, and 7191: Problem Determination and Service Guide
