HP Notebook PC Reference Manual page 114

If a serial modem doesn't work properly
• See "Modem Problems" on page 105.
• 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 116.
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 116.
Troubleshooting and Maintenance
Troubleshooting Your Computer
Reference Guide 113