HP OmniBook XE4400 User Manual page 139

If a serial modem doesn't work properly
See "Modem Problems" on page 131.
Make sure the port connection is secure.
Use the Modem troubleshooter in Windows Help: click Start, Help and Support (or
Help).
In Control Panel, open Phone and Modem Options, and check the modem settings.
Disable the internal modem:
1. Open the hardware Device Manager: click Start, Control Panel, Performance and
Maintenance, System (Windows XP) or Start, Settings, Control Panel, System
(Windows 2000).
2. Double-click Modem to list the current modem devices.
3. Double-click the internal modem, and then select the option to disable the modem.
Check the port settings in Control Panel. Open the hardware Device Manager, and
then double-click Ports (COM & LPT).
If the serial or parallel port is not working
Make sure the port connection is secure.
Check the port settings in Control Panel. Open the hardware Device Manager, and
then double-click Ports (COM & LPT).
Test the ports with the e-Diagtools diagnostics. See "Testing the Hardware" on
page 142.
If a USB port is not working
Contact the vendor of the peripheral device— and the HP Business Support Web site
(www.hp.com/go/bizsupport)—for the latest USB drivers.
Check the port settings in Control Panel. Open the hardware Device Manager, and
then double-click Universal Serial Bus Controller.
Test the USB port with the e-Diagtools diagnostics. See "Testing the Hardware" on
page 142.
Troubleshooting and Maintenance
Troubleshooting Your Computer
Corporate Evaluator's Guide 139