Heat Problems; Infrared Problems - HP OmniBook XE4400 User Manual

If the hard disk makes a buzzing or whining noise
Back up the drive immediately.
See whether the noise is coming from elsewhere, such as from the fan or a PC Card
drive.
If files are corrupted
Open My Computer, select the disk you want to scan, click File, Properties, and use
the Tools tab.
Run the virus-scanning program. See "To protect against viruses" on page 44.
Test the hard disk drive with the e-Diagtools diagnostics. See "Testing the Hardware"
on page 142.
If necessary, you can format the hard disk and reinstall the original factory software.
See "To recover the factory installation of your hard disk" on page 148.

Heat Problems

Your computer normally gets warm during routine operation.
If the computer gets abnormally hot
Always set the computer on a flat surface, so that air can flow freely around and
underneath it.
Make sure the air vents on the bottom and sides of the computer are clear.
Keep in mind that games and other programs that drive CPU usage toward 100% can
increase the computer's temperature.

Infrared Problems

By default, the infrared port is not enabled, so you must enable it before you can use it.
If you have problems with infrared communications
Make sure the line between the two infrared ports is not blocked, and that the ports
face each other as squarely as possible. (The computer's infrared port is located on
the front of the computer.) The ports should be no more than 1 meter apart.
Troubleshooting and Maintenance
Troubleshooting Your Computer
Corporate Evaluator's Guide 127