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Troubleshooting Your System 151
Troubleshooting a Serial I/O Device
1
Turn off the system, including any attached peripherals, and disconnect
the system from the electrical outlet.
2
Swap the serial interface cable with another working cable, and turn on the
system and the serial device.
If the problem is resolved, replace the interface cable.
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.
If the problem persists, see "Getting Help."
Troubleshooting a NIC
1
Run the appropriate online diagnostic test. See "Using Dell™ Diagnostics."
2
Restart the system and check for any system messages pertaining to the
NIC controller.
3
Check the appropriate indicator on the NIC connector. See "NIC Indicator
Codes."
• If the link indicator does not light, check all cable connections.
• If the activity indicator does not light, the network driver files might
be damaged or missing.
• Use another connector on the switch or hub.
If you are using a NIC card instead of an embedded NIC, see the
documentation for the NIC card.
4
Ensure that the appropriate drivers are installed and the protocols are
bound. See the NIC's documentation.
5
Enter the System Setup program and confirm that the NIC ports are
enabled. See "Integrated Devices Screen."
6
Ensure that the NICs, hubs, and switches on the network are all set to the
same data transmission speed and duplex. See the documentation for each
network device.