HP iPAQ hx4700 Frequently Asked Questions Manual page 29

3. When the Pocket PC screen begins to fade, release the
Calendar and iTask buttons first, and then remove the stylus
from the Reset button.
Note:
If you simultaneously push and hold the Reset, Calendar,
and iTask buttons for more than two seconds, the battery
disconnects. To restart the unit, either plug the unit into the AC
Adapter or press the Reset button again.
After performing a hard reset, you may need to reinstall
applications stored in iPAQ File Store to restore shortcuts and full
functionality.
The Pocket PC resets and powers on.
If the Pocket PC does not power on after a reset, do the following:
Check the battery door to ensure it is locked. If not, slide the
battery lock switch to the left (or locked position) on the bottom
of the Pocket PC. This action locks the battery door.
If the battery door is not locked, the Pocket PC does not power
on. For more information, refer to "Installing the Battery" in
Chapter 3 of the User's Guide located on the Companion CD.
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