HP Presario 1800 Presario Select 1800 Series Maintenance and Service Guide - Page 22

Maintenance & Service Guide Presario 1800 Series Models: 1825 and 1800T | Home Page | Notice | Preface | Product Description | Troubleshooting Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications Pin Assignments | Battery Pack Operations Power Management for Windows 98 The following power management features are available for conserving AC power and extending battery operating time: q Power Management Settings q Hibernation Mode q Sleep Mode q Battery Operating Time q Rebooting After a Lockup q Recovering From a Loss of Electrical Power q Servicing the Computer - Full Off Mode Power Management Settings Differing patterns of computer use determine the level 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, DVD/CD playback (while under program control that monitors Sleep), and modem use. Select different power settings or schemes through Power Management.The optional settings are Home/Office Desk, Portable/Laptop, and Always On. Change the following settings from the default settings: q when the computer goes into Sleep (Standby) mode q when the screen times out and goes blank q when the hard drive goes into low power mode. Each of these system components sleeps 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 the computer is on a network, Compaq recommends System Standby be set 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 Always on System Standby Turn OFF Monitor Turn OFF Hard Disks Plugged in Never 15 minutes 1 hour Running on Batteries 5 minutes 2 minutes 3 minutes Portable/Laptop System Standby Turn OFF Monitor Turn OFF Hard Disks Plugged in Never 3 hours 15 minutes Running on Batteries 15 minutes Never 10 minutes Home/Office Desk System Standby Turn OFF Monitor Turn OFF Hard Disks Plugged in 20 minutes 15 minutes 30 minutes Running on Batteries 1 minute 2 minutes 10 minutes CAUTION: The settings on the Alarms tab have been preset for the computer to run at its best. Changing any of these settings could cause the computer to function improperly. It is recommended that these settings be left at their default values. Power Management Properties Alarms: Low Battery Alarm: Critical Battery Alarm Alarm Actions: 10% 0% Notification: Text Power Mode: No Action Compaq Presario 1800 Series Computers have two levels of power management: Hibernation and Sleep. Hibernation mode occurs by pressing the Power button once. The computer saves the contents of the computer memory to the hard drive. This is followed by the computer turning off. Sleep mode is a low-power mode, also referred to as Standby mode. It occurs by pressing the Fn+F4 function key or by clicking the Start button, then Shutdown, then Standby. CAUTION: While in Sleep mode, the computer will maintain system information and open files. Unsaved information will be lost if the computer is turned off prior to system wakeup, or if a power loss occurs while using the AC adapter. The following table shows the conditions and indicators for getting in and out of the various power management modes, Sleep, Hibernation, and Off. Hibernation and Sleep Functions Mode To Initiate To End Sleep Manual - Fn+F4 key combination or click the Start button on the Windows Taskbar, then point to Shutdown, then Press any key. click Standby. Time-Out Default - 15 minutes if using battery power. Computer will not automatically enter Sleep mode if on AC power. Manual - Press Power Button once Hibernate Off Press Power Button once Time-Out Default - If your battery is low or after 1 hour of Sleep. Computer will not automatically enter Hibernation mode if on AC power. Standard - Perform normal Windows shutdown using the Start button on the Windows Taskbar. Press Power Button once Manual* - Press and hold down the Power button for 4 seconds. Indicators Flashing Power light* *Moon icon appears on status display (1800 Series only) Power light is off, screen is blank* *Power icon does not appear on status display (1800 Series only) No Power light (or icon), screen is blank. *The Manual shutdown mode is not recommended unless the Standard shutdown mode does not work. Hibernation Mode Hibernation helps conserve battery life and protect the data. Hibernation can be a routine power-saving event or the result of a low battery. As the computer enters Hibernation, it automatically saves the content of the computer memory to the hard drive before it turns off. The computer will automatically enter Hibernation mode when the battery has little power left or when the computer (operating on battery power) has been in Sleep mode for more than one hour. Activate Hibernation mode by pressing the Power button once. To restart the computer, press the Power button once. When the computer enters or wakes from Hibernation mode, it displays a Progress window. Top of Page Sleep Mode Selecting Sleep mode instead of turning off the computer when finished allows the computer to wake up faster than turning it completely off and saves power over the active (On) mode. Activate Sleep mode by pressing Fn+F4. Or, click Start, select the Shut Down option, and click Standby. Servicing the Computer - Full Off Mode The computer must be turned off completely when installing or replacing components in the system. 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). Top of Page Rebooting After a Lockup To reboot the computer (as if from a cold start), when the keyboard is frozen or the screen is locked, 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 does not recover, press the Power button and hold 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. Top of Page Recovering From a Loss of Electrical Power Loss of electrical power will cause the Internet PC to automatically turn off. This may cause loss of data because the Microsoft Windows operating system is not able to properly close all files and programs. Loss of power may be caused by one of the following: q Electrical power service is interrupted. q The power cord is accidentally disconnected. If power surges or sags, the display and status lights may flicker, and the computer may automatically restart. If an improper shutdown occurs, ScanDisk, a Microsoft Windows utility program, will automatically run once power is restored. ScanDisk will determine if the improper shutdown caused any errors on the hard disk. These errors may occur if the Microsoft Windows operating system was not able to properly close all files before the shutdown. If no errors are found, the restart process will continue. If ScanDisk does detect errors, follow the instructions shown to continue the restart process. Work that was not saved prior to the lockup may be lost. Use of a surge suppressor, line conditioner, or uninterruptible power supply (UPS) may protect the computer from damage caused by power surges or sags. If a power failure occurs or the power cord disconnects while the computer is turned on, turn off the computer until normal service has been restored. ScanDisk may run to check the hard disk for errors caused by the improper shutdown the next time the computer turns on. Top of Page Battery Operating Time Battery operating time is affected by variables such as the following: q Power conservation settings q Hardware configuration q Software applications q Installed options q Display brightness q Hard drive usage q Changes in operating temperature q 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. Top of Page