IBM Aptiva Handbook page 124

Table 3: Troubleshooting: Hardware problems
If the problem is:
Modem/communications errors.
Note: If any of these problems continue after taking the actions listed, see your online Aptiva Helper for information on running
diagnostics. If you need service, see the HelpWare book.
108 Chapter 8: Diagnosing and recovering from problems
Here's what to do:
1. Make sure the telephone cord is securely connected. Your Read me first
book shows how the cord should be connected.
2. Make sure the telephone line works by plugging a working telephone into
the same telephone outlet that the computer was plugged into. Then make
sure you can place a call.
3. Make sure you are calling the correct number, and that you are using the
correct communications settings. For additional help, refer to the
documentation for your communications software.
4. Make sure no one is using the telephone while you are communicating with
another computer.
5. If some communications programs work but others do not, there may be a
configuration problem. For additional help, refer to the documentation for
your communications software.
6. Make sure your modem cord is connected to an analog telephone line. For
additional help, see "Setting up communications" on page 18.
7. Make sure the modem adapter card is installed correctly. For instructions on
installing adapter cards, see "Adding and removing adapter cards" on
page 80.