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Serial-device problems

Use this information to solve problems with serial ports or devices.

Number of displayed serial ports is less than the number of installed serial ports​

Complete the following steps until the problem is solved.
  1. Make sure that:

    • Each port is assigned a unique address in the Setup utility and none of the serial ports is disabled.

    • The serial-port adapter (if one is present) is seated correctly.

  2. Reseat the serial port adapter.

  3. Replace the serial port adapter.

Serial device does not work​

  1. Make sure that:

    • The device is compatible with the server.

    • The serial port is enabled and is assigned a unique address.

    • The device is connected to the correct connector (see Lower processor board (MB) connectors).

  2. Reseat the following components:

    1. Failing serial device.

    2. Serial cable.

  3. Replace the following components:

    1. Failing serial device.

    2. Serial cable.

  4. (Trained technician only) Replace the upper processor board (CPU BD) or lower processor board (MB).