3Com 155 PCI manual Make sure that the 3C975 ATMLink NIC is in a bus master slot

What to Do If a Test Fails 6-15

2Inspect all cables and connections.

3Make sure that your computer was booted with DOS version 6.x, and that no device drivers or memory managers are loaded.

4Make sure that the PCI slot with the NIC in it is activated.

Some PCI computers allow PCI slots to be activated or deactivated through the computer‘s CMOS utility or a special PCI utility. Refer to your computer documentation for information about activating PCI slots.

5Make sure that the 3C975 ATMLink NIC is in a bus master slot.

Some computers do not support bus mastering on all PCI slots. The ATMLink NIC does not work in a non–bus master slot. Refer to your computer documentation.

6Try installing the NIC into another PCI slot. The original slot may be defective.

7Replace the failed NIC with a working NIC and run the diagnostic tests again.

If the working NIC passes all tests, the original NIC is probably defective. For information on returning products for repair, refer to Appendix B, “Technical Support.”

8Install the NIC in another functioning PCI computer and run the tests again.

Your computer may be defective. If the NIC passes the tests in the second computer, contact the reseller or manufacturer of the original computer.

9Remove all other PCI NICs from the computer and run the tests again. If the tests pass, the other PCI NICs may be causing contention.

3Com recommends that you always run the most current version of the system BIOS. Firmware upgrades are often available online from the manufacturer of your computer system.