Rebooting After A Lockup; Battery Operating Time - Compaq 1200US - Presario - Celeron 800 MHz Maintenance And Service Manual

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Illustrated Parts Catalog
Power Management for Windows 98
The following power management features are available for conserving AC power and extending battery operating time:
Power Management Settings
Sleep
Hibernation

Battery operating time

Rebooting After a Lockup

Servicing Your Computer - Full Off Mode
Pow
er Management Settings
Depending on your patterns of computer use, you can set different levels of power management. These different power
management levels can be activated based on the amount of time passed since the last system activity. System activity
examples include keyboard or mouse movement, CD playback (while under program control that monitors Sleep), and
modem use.
You can select different conditions or power schemes through Power Management.The optional settings are Home/Office
Desk, Portable/ Laptop, and Always On. From the default settings, you can change the following settings:
the System goes to Sleep (Standby) mode
the screen times out and goes blank
the hard drive spins down
Each of these system components goes to sleep after the selected or default periods of inactivity.
(The setting for hard drive must be less than, or equal to, the setting for System.)
If you're on a network, it's recommended that you set System Standby
IMPORTANT:
Never.
There are five categories of power management settings under the Control Panel. The default setting
for each feature is listed below in the tables.
Tab: Power Schemes:
Always on System Standby:
Turn OFF Monitor
Always on System Standby:
Tab: Alarms:
Low Battery Alarm:
Critical Battery Alarm:
Alarm Actions:
Tab: Power Meter:
Tab: Advanced:
Tab: Monitor: Laptop Display (Maximum resolution according to unit display size)
Sleep
You can select Sleep mode instead of turning off the computer when you have finished using it. This allows the computer to
wake up faster than turning it completely off and saves power over the active (On) mode.
Compaq Presario Series Notebook computers have two levels of sleep-- Hibernation and Sleep.
Hibernation - by pushing the power button once, your computer performs a save to disk followed by a shut down of the
computer into Off mode.
Sleep - is a low power mode, also referred to as Standby mode. While in Sleep mode, your computer maintains system
information and open files. Unsaved information is lost if you turn off your system prior to system wake-up, or if you lose
power while using the AC adapter.
CAUTION: While in Sleep mode, your computer maintains system information and open
files. Unsaved information is lost if you turn off your system prior to system wake-up, or if
you lose power while using the AC adapter.
Hibernation Mode
Hibernation helps conserve battery life and protects your data. Hibernation can be a routine power-saving event, or can be
the result of a low-battery condition. As it enters Hibernation your computer displays a progress screen, as it automatically
saves the machine state before it shuts down and turns itself off. Your computer automatically goes into Hibernation when
the battery has little power left, or when the system (operating on battery power) has been in Sleep mode for more than an
hour. You can also manually initiate Hibernation by pressing the power button once while the system is active. To restore
the computer's previous state, simply press the power button once again. While waking up, the computer displays a
progress screen.
The following table shows the conditions and indicators for getting in and out of the various power management modes -
Sleep, Hibernation, and Off.
Mode
Sleep
Hibernate
Off
Servicing Your Computer - Full Off Mode
If you need to install or replace components in your system, you must turn the computer off completely. Follow the
instructions above for properly placing the computer into Off mode. Then, unplug the computer from the
AC outlet and remove the battery (see battery section for
Rebooting After a Lockup
Occasionally you may encounter a frozen keyboard or a locked screen. To reboot your computer (as if from
a cold start) press and hold down the Power Button for at least four seconds, which will cause a manual shutdown. Then,
restart it with a single press of the Power Button. If it still doesn't recover, do the following:
1.
Press the Power Button and hold it for four seconds to shut it down.
2.
Remove the battery or unplug the AC power for at least 30 seconds.
3.
Reinsert the battery or reconnect AC power.
4.
Press the Power Button once to reboot.
Battery Operating Time
Battery operating time is affected by variables, such as the following:
For more information on increasing battery pack operating time, conditioning the battery pack, and disposing of a used
battery pack, refer to the
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Maintenance & Service Guide
Models: 1246, 1247, 1277, 1278, and 1279
Home Page | Notice |
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Pin Assignments
Power Management Properties
Plugged in
Never
After 3 hours
After 15 minutes
Power Management Properties
10%
0%
X Display Message Notification
Text Action
Power Management Properties
Default
Default
To Initiate
Manual keys combination-
Fn+F4
Time Out Default 15 minutes. If
on Battery power (system will
not go to Sleep if on AC power)
Manual - Press Power button
once
Time Out Default If low battery or after 1
hour of sleep (system will not Hibernate
if on AC power)
Perform normal Windows
shutdown via the start button, or
press and hold down the power
button for 4 seconds
Power conservation settings
Hardware configuration
Software applications
Installed options
Display brightness
Hard drive usage
Power button
Changes in operating temperature
Type and number of installed PC Cards
Battery Pack Operations.
Presario Series
Preface | Product Description
Removal & Replacement Procedures
| Battery Pack Operations
Running on Batteries
15 minutes
Never
After 10 minutes
No Action
Display Properties
instruction for removing the battery
| Troubleshooting
| Specifications
To End Indicators
Press any Flashing green Power
key LED
Press Power No Power LED, blank
button once screen
Press Power No Power LED, blank
button once screen
pack).
to