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Troubleshooting serial port issues - Desktops

To troubleshoot serial port issues, follow these steps and test the serial port after performing each one:

Note:
Before you begin, you will need to verify that you have the latest BIOS.

  1. Ensure that the latest BIOS code is installed.
  2. Use one of the following two methods to check if your serial port is enabled and properly configured in the BIOS. The method used will depend on the BIOS that is installed on the system
    • Method #1

      Verify that the serial port is enabled and properly configured in the System Configuration utility:

      1. Power-on the system
      2. Press F1 when the Setup Utility program appears
      3. Using the right arrow key (->), select Devices
      4. Using the down arrow key, select Serial Port Setup, then press Enter.
      5. Ensure that serial port is marked Enabled.
    • Method #2

      Verify the port is enabled and the resources are correct in the System Configuration utility:

      1. Power on the system, press F1 to enter the Configuration/Setup Utility.
      2. Using the down arrow key, highlight Devices and I/O ports, then press Enter.
      3. Using the down arrow keys, highlight Serial Port Setup, and press Enter.
      4. Verify that you have the correct IRQ settings for the port.
      5. Press ESC until you get to the Exit Setup window, then highlight Yes, Save and Exit the Setup Utility.
  3. Verify that the serial port is seen in Device Manager and that there are no conflicts.
     
    1. For Windows 2000 or Windows XP using the classic mode, click Start, select Settings, and then click Control Panel. Double-click System.
      For Windows XP using category mode, click Start, and then click Control Panel. Click Performance and Maintenance and then click System.
    2. Click the Hardware tab and then click the Device Manager button.

     

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  • Alias ID: MIGR-4Y6LGQ
  • Document ID: HT080204
  • Last Updated :12/16/2014
  • (c) 2014 Lenovo