Dell 745N manual Troubleshooting Basic I/O Functions, Troubleshooting a Serial I/O Device

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4Enter the System Setup program and ensure that the USB ports are enabled. See "Using the System Setup Program" in your User's Guide.

If the problem is not resolved, continue to the next step.

5Run the pointing devices test in the system diagnostics. See "Running the System Diagnostics."

If the test fails, see "Getting Help."

Troubleshooting Basic I/O Functions

Problem

•Error message indicates a problem with a serial port.

•Device connected to a serial port is not operating properly.

Action

1Enter the System Setup program and ensure that the serial port(s) are enabled. See "Using the System Setup Program" in the User's Guide.

2If the problem is confined to a particular application, see the application documentation for specific port configuration requirements that the program may require.

3Run the appropriate online diagnostic test. See "Using Server Administrator Diagnostics" in "Running System Diagnostics."

If the tests run successfully but the problem persists, see "Troubleshooting a Serial I/O Device."

Troubleshooting a Serial I/O Device

Problem

•Device connected to the serial port is not operating properly.

Action

1Turn off the system and any peripheral devices connected to the serial port.

2Swap the serial interface cable with a working cable, and turn on the system and the serial device.

If the problem is resolved, replace the interface cable. See "Getting Help."

3Turn off the system and the serial device, and swap the device with a comparable device.

4Turn on the system and the serial device.

If the problem is resolved, replace the serial device. See "Getting Help." If the problem persists, see "Getting Help."

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Troubleshooting Your System