Dell DR4000 Owner's Manual - Page 123
Troubleshooting a Serial I/O Device, Troubleshooting a NIC
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7 Reconnect and power on each USB device one at a time. 8 If a device causes the same problem, power down the device, replace the USB cable, and power up the device. If the problem persists, replace the device. If all troubleshooting fails, see "Getting Help" on page 149. Troubleshooting a Serial I/O Device 1 Turn off the system and any peripheral devices connected to the serial port. 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" on page 149. Troubleshooting a NIC 1 Run the appropriate Embedded System diagnostic test. See "Running the Embedded System Diagnostics" on page 140. 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" on page 17. • 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. Remove and reinstall the drivers, if applicable. See the NIC's documentation. Troubleshooting Your System 123