                               3Com Corporation
              EtherDisk Diskette for the EtherLink III/PCMCIA Adapter
                               Troubleshooting



 If the adapter diagnostic tests fail, the adapter might not be defective.
 Check the following:

 1.  Make sure that the adapter is operating in a computer containing the
     Personal Computer Memory Card International Association (PCMCIA) 
     Release 2.01, Type II or Type III slots.

 2.  Make sure that the adapter is completely seated in its slot.  Review
     the installation instructions in the appropriate adapter guide.

 3.  Make sure that your computer 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 running the Group 2 test, make sure that the adapter (coax
     only) is securely connected to a loopback plug or to a properly cabled 
     network.

 6.  If you are running the Group 3 test, make sure that the adapter is
     securely connected to a properly cabled network and an echo server is
     set up on the network.

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

 8.  Make sure that the configuration setting for the transceiver type is
     correct.

 9.  Running the Group 2 test (coax only) while connected to an active network
     can cause intermittent failures.  These failures can be avoided by using 
     a loopback plug or by connecting to an inactive network on which only the
     computer being tested is operating.

 10. Check the LED during or after the diagnostic tests have been run.  The 
     LED will be on when there is a correct connection between the adapter 
     and the hub.  The LED will flash if the polarity of the connection is 
     swapped.

 11. The computer in which the adapter is installed might be defective.
     Install the adapter in a known functioning computer and run the tests
     again.

 12. The loopback plug you are using might be defective.  Try a different
     loopback plug.

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

		   (%VER  Troubleshooting v2.1b)
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