HP Jornada 420 User Manual page 102

98 Hewlett-Packard Jornada 420 Palm-size PC
If you are unable to use infrared to transfer information between
Windows CE-based devices, try the following.
·
Transfer only one file, or no more than 25 contact cards, at a
time.
·
Position the infrared ports so that they line up and are less
than 20 centimeters (8 inches) but more than 2 inches apart.
·
Make sure nothing is between the two infrared ports.
·
Adjust the room lighting. Some types of light interfere with
infrared communication. Try moving to a different location or
turning off some lights.
If you are having trouble viewing your data, here are some
suggestions.
If the device does not respond when you briefly press the On
button:
·
Make sure your battery cover is locked.
·
Adjust the display contrast. On some devices, the screen can
darken or lighten to the point that it appears to be powered
off. For information on adjusting contrast, see "Setting
brightness, contrast, and volume" on page 31.
·
Reset the device.
·
Charge the main battery by connecting to AC power.
Prolonged exposure to direct sunlight may cause your device
screen to temporarily darken. This is normal for LCD screens
and is not permanent.