Serial-device problemsThis information provides steps for solving serial-device problems.Table 37. Symptoms and actions for serial-device problemsv Follow the suggested actions in the order in which they are listed in the Action column until the problem issolved.v See Chapter 5, “Parts listing, System x3750 M4 Types 8722 and 8733,” on page 215 to determine whichcomponents are customer replaceable units (CRU) and which components are field replaceable units (FRU).v If an action step is preceded by (Trained service technician only), that step must be performed only by a Trainedservice technician.Symptom ActionThe number of serial ports thatare identified by the operatingsystem is less than the numberof installed serial ports.1. Make sure that the following conditions are met:v Each port is assigned a unique address in both the Setup utility and theoperating system, and none of the serial ports are disabled.v The serial-port adapter (if one is present) is seated correctly.2. Reseat the serial port adapter.3. Replace the serial port adapter.A serial device does not work. 1. Make sure that the following conditions are met:v The device is compatible with the server.v The serial port is enabled and is assigned a unique address in both theSetup utility and the operating system.v The device is connected to the correct connector (see “System-board internalconnectors” on page 28 and “System-board external connectors” on page 29).2. Reseat the following components:a. Failing serial deviceb. Serial cable3. Replace the components listed in step 2 one at a time, in the order shown,restarting the server each time.4. Replace the serial adapter (if one is installed).5. (Trained service technician only) Replace the system board.ServerGuide problemsThis information describes the actions you need to take to resolve the ServerGuideprogram problems.Chapter 4. Troubleshooting 203
