Serial-device problems

See this section 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 procedure to solve the problem.

  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

Complete the following procedure to solve the problem.

  1. Make sure that:
    • The device is compatible with the solution.

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

    • The device is connected to the correct connector.

  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 system board.