3Com Corporation
3Com Megahertz 10/100 LAN CardBus PC Card
Troubleshooting Information

If the PC Card diagnostic tests fail, 
the PC Card may not be defective.

Check the following:

1. Make sure that the  PC Card is operating in a notebook 
   containing a CardBus slot.

2. Make sure that the PC Card is completely seated in its 
   slot. 

3. Make sure that your notebook is running DOS 3.1 or 
   higher and that no device drivers or memory managers are 
   loaded.

4. Inspect all cables and connections.

5. If you are configuring the I/O base address or interrupt 
   request level make sure that the settings you select for 
   these parameters do not conflict with any other peripheral 
   or software program installed in the computer.

6. The notebook in which the PC Card may be defective.  
   Install the PC Card in a known functioning notebook
   and run the tests again.

7. Replace the failed PC Card with a known working PC Card, 
   with the same configuration. If the second PC Card fails, 
   something is probably wrong with the test environment, 
   not with the PC Card.

For more troubleshooting tips, see Help575.

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