HP 1805 manual Power Management for Windows

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

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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 (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 will go 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.)

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

Tab: Power Schemes:	Plugged in	Running on
		Batteries
Always on System	Never	15 minutes
Standby:
Turn OFF Monitor	After 15 minutes	After 10 minutes
Always on System	After 15 minutes	After 10 minutes
Standby:

Power Management Properties

Tab: ALARMS::
Low Battery Alarm:	10%
Critical Battery Alarm	0%
Alarm Actions:	X Display Message Notification
	Text Action	No Action

Power Management Properties

Tab: POWER METER:	Default
Tab: ADVANCED	Default

Display Properties

Tab: POWER METER: Monitor Laptop Display (Maximum resolution according to unit display size)

	System Properties
Tab: Device Manager
Default:
Disk Drives:	X DMA
CD ROM:	X DMA
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	Press any key	Flashing green
	combination		Power LED
	- Fn+F4
	Time Out
	Default 15
	minutes. If on
	Battery power
	(system will not
	go to Sleep if
	on AC power)
Hibernate	Manual - Press	Press Power	No Power LED,
	Power Button	Button once	blank screen
	once
	Time Out
	Default If low
	battery or after
	1 hour of sleep
	(system will not
	Hibernate if on
	AC power)
Off	Perform normal	Press Power	No Power LED,
	Windows	Button once	blank screen
	shutdown via
	the start
	button, or press
	and hold down
	the power
	button for 4
	seconds

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 instruction 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) 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, press the Power Button 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 press the Power Button 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.