Dell 745N Troubleshooting Basic I/O Functions

38 Troubleshooting Your System
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4 Enter 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.
5 Run 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
1
Enter the System Setup program and ensure that the serial port(s) are enabled. See "Using
the System Setup Program" in the
User's Guide .
2 If the problem is confined to a particular application, see the application documentation for
specific port configuration requirements that the program may require.
3 Run 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
1
Turn off the system and any peripheral devices connected to the serial port.
2 Swap 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."
3 Turn off the system and the serial device, and swap the device with a comparable device.
4 Turn 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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