Serial-device problemsv Follow the suggested actions in the order in which they are listed in the Action column until the problemis solved.v See Chapter 4, “Parts listing, System x3550 M3 Types 4254 and 7944,” on page 159 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 aTrained service technician.v Go to the IBM support Web site at http://www.ibm.com/systems/support/ to check for technicalinformation, hints, tips, and new device drivers or to submit a request for information.Symptom ActionThe number of serial ports thatare identified by the operatingsystem is less than the numberof installed serial ports.1. Make sure that:v Each port is assigned a unique address in the Setup utility and none of theserial ports is 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:v The device is compatible with the server.v The serial port is enabled and is assigned a unique address.v The device is connected to the correct connector (see “Internal LEDs,connectors, and jumpers” on page 16).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. (Trained service technician only) Replace the system board.ServerGuide problemsv Follow the suggested actions in the order in which they are listed in the Action column until the problemis solved.v See Chapter 4, “Parts listing, System x3550 M3 Types 4254 and 7944,” on page 159 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 aTrained service technician.v Go to the IBM support Web site at http://www.ibm.com/systems/support/ to check for technicalinformation, hints, tips, and new device drivers or to submit a request for information.Symptom ActionThe ServerGuide Setup andInstallation CD will not start.1. Make sure that the server supports the ServerGuide program and has astartable (bootable) CD or DVD drive.2. If the startup (boot) sequence settings have been changed, make sure that theCD or DVD drive is first in the startup sequence.3. If more than one CD or DVD drive is installed, make sure that only one drive isset as the primary drive. Start the CD from the primary drive.Chapter 3. Diagnostics 99
