HP Pavilion User Manual page 53

Note
Sometimes the system stops responding and you are not able to turn off the computer as
described above. To recover, use the following in the order listed.
• If you are unable to access the Start menu, you can turn off the system by pressing
and holding the blue power button for 4 seconds.
• If holding the blue power button fails, insert a pin or straightened paper clip into the
system-off button on the bottom of the computer (see "Bottom view" on page 16).
When the system hibernates as a result of a critically low battery, you will find when
resuming that all your data has been saved but that some functions may be disabled. To
resume normal operation, restore power (by connecting AC power or installing a
charged battery), perform a full shutdown, and then restart the computer.
Traveling with Your Computer
Managing Power Consumption
User's Guide 53