HP Pavilion N5402L - Serial, Parallel, and USB Problems

Solving Problems with Your Computer
Troubleshooting Techniques
Reference Guide 107
If the left edge of printed output is missing
• If the printer you are using is a 600-dpi (dots per inch) printer, try selecting a
compatible printer driver for a 300-dpi printer. For example, for a 600-dpi
HP LaserJet printer, try using the HP LaserJet IIIsi driver (300-dpi). Certain
applications may not work properly with 600-dpi printers.
Serial, parallel, and USB problems
If a serial mouse doesn’t work
• Make certain you completely followed the manufacturer’s installation instructions to
install the mouse properly.
• Make sure the port connection is secure.
• Press the blue standby button to suspend and resume.
• Restart the computer: click Start, Turn Off Computer, Restart.
• Check mouse settings in Control Panel: click Start, Control Panel, Printers and Other
Hardware, Mouse.
• Check the port settings in Control Panel: open the hardware Device Manager, then
double-click Ports (COM & LPT).
If a serial modem doesn’t work properly
• See “Modem problems” on page 99.
• In Windows Help and Support use the Modem troubleshooter.
• Make sure the port connection is secure.
• 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.
2. Double-click Modem to list the current modem devices.
3. Double-click the internal modem, then select the option to disable the modem.