Dell PowerEdge 2450 - Manual (Page 49)

support.dell.com Checking the Equipment 6-7
7. Turn on the computer and the USB device.
Is the problem resolved?
Yes. The USB device must be replaced. See Chapter 11, “Getting Help,” for
instructions on obtaining technical assistance.
No. See Chapter 11, “Getting Help,” for instructions on obtaining technical
assistance.
If you encounter problems with the computer's integrated network interface control-
ler (NIC), the following actions may help you to diagnose the problem:
Enter the System Setup program and confirm that the NIC is enabled.
See “Using the System Setup Program” in the User's Guide for instructions.
Check the two light-emitting diodes (LEDs) on the corners of the NIC connector
on the computer's back panel.
The green link LED (the LED closest to the serial and parallel ports) indicates that
the adapter is connected to a valid link partner. The amber activity indicator lights
if network data is being sent or received.
— If the LINK light is not on, check all cable connections at the adapter and link
partner.
— Try changing the auto-negotiation setting on the link partner, if possible.
— Try another port on the switch.
If the activity indicator does not light, the network driver files may be damaged or
deleted.
Reinstall the drivers.
Make sure the appropriate drivers are installed and the protocols are bound.