Sharp PC-AR50 Manual page 102

Confirm the COM1 port is not disabled using the following procedure.
1. In the System Properties dialog box, select Device Manager.
2. Double-click Ports(COM&LPT); then, Communications Port (COM1).
3. Make sure the item Disable in this hardware profile is unchecked.
Confirm the COM 1 port is not used by another applications.
Confirm the item Serial Port is set appropriately in the Advanced menu of the
setup utility.
Trouble with Communication
Question: Why can't I communicate through the built-in modem?
Confirm the telephone line is properly connected to the modem telephone
socket.
Confirm the dial settings of Windows Me or communication software are
matched with the telephone line (Example: To access an outside line, first dial
"7" for local, "1" for long distance).
Confirm the network configuration is appropriate.
Confirm the user name or password is correct.
Confirm the COM port in the communication software is set appropriately.
Turn off the power management and screen savers.
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