3Com Fast EtherLink 3C515-TX, User Manual, Page: 53 / 80

Getting Help If a Test Fails 5-7
If a test fails, the NIC may not be defective. The problem
may be incorrect option settings, option settings that
conflict with the settings of other boards, or improper
installation.
If you need to test the NIC further, use the following
troubleshooting tips:
CAUTION: Before inserting or removing the NIC from the
computer, turn the computer’s power off.
■
Check the NIC installation by reviewing Chapter 2.
Make sure the board is seated correctly in the slot.
Check for specific hardware problems, such as broken
traces or loose/broken solder connections.
■
Inspect all cables and connections. Check the length
and rating of the UTP cable connection. Make sure
the cable segment is compliant with 10BASE-T or
100BASE-TX recommendations. Maximum length
for all types of cabling for this NIC is 100 meters.
■
Try inserting the NIC in another slot. The original slot
in which the NIC sits may be defective.
■
Before you run any tests, make sure that you booted
your computer under DOS, and that no device drivers
or memory managers are loaded.
■
If you are running the Group 3 test, make sure that
the NIC is connected to a properly cabled and inactive
network and that an echo server is set up on
the network.
■
Replace the failed NIC with a working NIC and run the
diagnostic tests again, using the same option settings
as those used on the failed NIC. If the working NIC
passes all tests, the original NIC is probably defective.
For information on product repair, see Appendix B.
■
Install the NIC in another functioning PC and run the
tests again. The first computer you used for testing may
be defective if the NIC passes the tests in this computer.