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Compaq Presario Series Maintenance and Service Guide
United States December 9, 2002
Presario 305 Model
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments
Index
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
Power 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 or DVD playback (while under program
control that monitors Sleep), and modem use.
Each of the following system components can be made to go to sleep after periods of inactivity:
● system (goes into Sleep (Standby) mode)
● screen (times out and goes blank)
● hard drive (spins down)
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 delay
time settings. Note: the setting for hard drive must be less than or equal to the setting for System.
IMPORTANT:
If you're on a network, it's recommended that you set
System Standby to 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.
Power Management Properties
Power Schemes:
Plugged in Running on Batteries
Always on System Standby:
Never 15 minutes
Turn OFF Monitor
After 15 minutes After 10 minutes
Always on System Standby:
After 15 minutes After 10 minutes
ALARMS:
Low Battery Alarm:
10%
Critical Battery Alarm: 0%
Alarm Actions: X Display Message Notification
Text Action No Action
POWER METER:
Default
ADVANCED:
Default
Display Properties
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 Notebook computers have two levels of sleep, Hibernation and Sleep.
Hibernation - by pushing the power button once your computer will perform 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 will
maintain system information and open files. Unsaved information will be 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 will maintain system information
and open files. Unsaved information will be 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 will display a progress
screen, as it automatically saves the machine state before it shuts down and turns itself off. Your computer will
automatically go 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 will display 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 To Initiate To End Indicators
Sleep
Manual keys Standby button Standby
button
Flashing green
Power LED
Time Out Default 15 minutes. If on Battery
power (system will not go to Sleep if on AC
power)
Hibernate
Manual - Slide Power Switch once Slide Power
Switch once
No Power LED,
blank screen
Time Out Default If low battery or after 1 hour
of sleep (system will not Hibernate if on AC
power)
Off Perform normal Windows shutdown via the
start button, or press and hold down the
power button for 4 seconds
Slide Power
Switch once
No Power LED,
blank screen
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 putting the computer into Off mode, unplug from the outlet, and remove the
battery (see battery section for instructions on removing battery).
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) slide and hold down the Power Switch for at least four seconds, which will cause a manual shutdown.
Then, restart it with a single slide of the Power Switch. If it still doesn't recover, slide the Power Switch and hold
it for four seconds to shut it down, then, remove the battery or unplug the AC power for at least 30 seconds.
Reinsert the battery or reconnect AC power and slide the Power Switch once to reboot.
Battery Operating Time
Battery operating time is affected by variables, such as the following:
● 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
For more information on increasing battery pack operating time, conditioning the battery pack, and disposing of
a used battery pack, refer to the
Battery Pack Operations.
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