3com 3C990B-TX-M Manual De Usuario

8      Troubleshooting the NIC

82

To view the LEDs in the 3Com NIC Diagnostics program:

1 Make sure that the NIC, the network driver, and the 3Com NIC Diagnostics program 

are installed.

2 Open the Windows Start menu.

3 Select Programs, and then 3Com NIC Utilities.

4 Click 3Com NIC Doctor.

The 3Com NIC Diagnostics General screen appears and displays following LEDs:

Link — lights if there is a valid connection between the NIC and the network.

Transmit — lights if the NIC is transmitting information.

Receive — lights if the NIC is receiving information.

If a Link LED indicates a problem, check the following ensure that:

1 Your network hub or switch and the cable connecting to your NIC comply with the 

specifications appropriate for your network connection.

2 The hub or switch is powered on.

In addition to the 3Com support databases listed in this section, check the README.TXT 
files in the ENGLISH, INSTALLS, and NWSERVER subdirectories and check the Help text 
files located in the HELP directory on the EtherCD.

To access a database of technical information that can help you diagnose and solve NIC 
installation, configuration, and upgrade problems, go to:

To access the 3Com NIC Help system:

1 Make sure that the NIC, its driver, and the 3Com NIC Diagnostics program are installed.

2 Open the Windows Start menu.

3 Select Programs, and then 3Com NIC Utilities.

4 Select 3Com NIC Doctor Help.

The main Help screen appears. 

5 Click Help Topics to display a list of Help topics or click Find to search for a Help topic.

NOTE: For instructions on using the 3Com NIC Diagnostics program, see 
“Running NIC Diagnostics” on page 91.