Owners Manual

2. Swap the serial interface cable with a known working cable, and turn on the system and the I/O serial device.
If the problem is resolved, replace the interface cable with a known working cable.
3. Turn off the system and the I/O serial device, and swap the serial device with a compatible device.
4. Turn on the system and the I/O serial device.
If the problem persists, see the Getting help section.
Related references
Getting help on page 187
Troubleshooting a NIC
NOTE: Network Daughter Card (NDC) slot is not hot-pluggable.
1. Run the appropriate diagnostic test. For more information, see the Using system diagnostics section for the available
diagnostic tests.
2. Restart the system and check for any system messages pertaining to the NIC controller.
3. Check the appropriate indicator on the NIC connector:
● If the link indicator does not glow, the cable connected might be disengaged.
● If the activity indicator does not glow, the network driver files might be damaged or missing.
Install or replace the drivers as necessary. For more information, see the NIC documentation.
● Try another known good network cable.
● If the problem persists, use another connector on the switch or hub.
4. Ensure that the appropriate drivers are installed and the protocols are bound. For more information, see the NIC
documentation.
5. Enter System Setup and confirm that the NIC ports are enabled on the Integrated Devices screen.
6. Ensure that all the NICs, hubs, and switches on the network are set to the same data transmission speed and duplex. For
more information, see the documentation for each network device.
7. Ensure that all the NICs and switches on the network are set to the same data transmission speed and duplex. For more
information, see the documentation for each network device.
8. Ensure that all network cables are of the proper type and do not exceed the maximum length.
If the problem persists, see the Getting help section.
Related references
Getting help on page 187
Using system diagnostics on page 180
Troubleshooting a wet system
CAUTION:
Many repairs may only be done by a certified service technician. You should only perform
troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or
telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by
your warranty. Read and follow the safety instructions that are shipped with your product.
1. Turn off the system and attached peripherals, and disconnect the system from the electrical outlet.
2. Remove the system cover.
3. Remove the following components (if installed) from the system:
● Power supply unit(s)
● Optical drive
● Hard drives
● Hard drive backplane
Troubleshooting your system
171