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Lenovo A720 manual Additional Service Information, Power management, Automatic Power-On features

Models: A720

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Chapter 9. General information

This chapter provides general information that applies to all computer models covered by this manual.

Additional Service Information

This chapter provides additional information that the service representative might find helpful.

Power management

Power management reduces the power consumption of certain components of the computer such as the system power supply, processor, hard disk drives, and some monitors.

Advanced configuration and power interface (ACPI) BIOS

As this computer has an ACPI BIOS system, the operating system is allowed to control the power management features of the computer and the settings for Advanced Power Management (APM) BIOS mode is ignored. Not all operating systems support ACPI BIOS mode.

Automatic Power-On features

The Automatic Power-On features within the Power Management menu allow you to enable and disable features that turn on the computer automatically.

•Wake Up on Alarm: You can specify a date and time at which the computer will be turned on automatically. This can be either a single event , a daily event or a weekly event.

•Wake Up on LAN: This feature allows LAN adapter card to wake the System.

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Lenovo A720 manual Additional Service Information, Power management, Advanced configuration and power interface Acpi Bios

Contents

IdeaCentre A720 Hardware Maintenance Manual Page IdeaCentre A720 Hardware Maintenance Manual Page Contents Iv IdeaCentre A720Hardware Maintenance Manual About this manual Important Safety InformationIdeaCentre A720Hardware Maintenance Manual Safety information General safetyElectrical safety IdeaCentre A720Hardware Maintenance Manual Handling electrostatic discharge-sensitive devices Safety inspection guideGrounding requirements Safety noticesTo Connect To Disconnect Do not≥18 kg 37 lbs ≥32 kg 70.5 lbs ≥55 kg 121.2 lbs Environment SpecificationsGeneral information Type IdeaCentre A720IdeaCentre A720Hardware Maintenance Manual General Checkout IdeaCentre A720Hardware Maintenance Manual Using passwords Using the Setup UtilityStarting the Lenovo Bios Setup Utility program Viewing and changing settingsAdministrator Password Setting, changing, or deleting an Administrator passwordSetting, changing, or deleting a Power-On Password Select Save changes and Exit from the menu Enabling or disabling a deviceSelecting a startup device Selecting a temporary startup deviceSelecting or changing the startup device sequence Exiting the Lenovo Bios Setup Utility program IdeaCentre A720Hardware Maintenance Manual Error FRU/Action Symptom-to-FRU IndexHard disk drive boot error Power Supply ProblemsPost error codes Undetermined problemsPost Error Message Description/Action Font view Locating connectors, controls and componentsLeft and right view Rear view CPU Hardware componentsIdentifying parts on the motherboard TV-Tuner card connector Battery Identifying parts on the back of the LED panel IdeaCentre A720Hardware Maintenance Manual Pre-disassembly instructions Replacing hardwareGeneral information To replace the keyboard and mouse Replacing the power cord or power adapterTo replace the power cord and power adapter Replacing the keyboard and mouseTo remove the base cover Removing the base coverTo replace the hard disk drive Replacing the hard disk driveReplacing hardware To replace the system fan Replacing a memory moduleReplacing the system fan To replace a memory moduleTo replace the heat-sink Replacing the heat-sinkTo replace the CPU Replacing the CPUReplacing hardware To replace the optical drive Replacing the optical driveReplacing hardware To replace the optical drive eject board Replacing the solid state diskReplacing the optical drive eject board To replace the solid state diskTo replace the motherboard Replacing the motherboardIdeaCentre A720Hardware Maintenance Manual To replace the speaker system Replacing the speaker systemIdeaCentre A720Hardware Maintenance Manual To replace the TV tuner card Replacing the TV tuner cardTo replace the battery Replacing the batteryTo remove the hinge from the chassis Removing the hinge from the chassisIdeaCentre A720Hardware Maintenance Manual To remove the rear cover Removing the rear coverTo replace the scalar board Replacing the scalar boardReplacing hardware To replace the touch control board Replacing the touch control boardTo replace the converter board Replacing the converter boardTo replace the power switch board Replacing the power switch boardTo replace the Bluetooth module Replacing the Bluetooth moduleTo replace the Wlan card Replacing the Wlan cardTo replace the camera Replacing the cameraTo replace the front function board Replacing the front function boardTo replace the LED panel Replacing the LED panelIdeaCentre A720Hardware Maintenance Manual FRU lists Motherboard Item # FRUs Service Part Number FRUOptical disk drive MemoryHard disk drive Solid state diskHeat-sink Power SupplyRemote control Bluetooth moduleKeyboard Touch control boardMouse Power cordsPanel Back Light Cable MechanicalIdeaCentre A720Hardware Maintenance Manual Automatic Power-On features Additional Service InformationPower management Advanced configuration and power interface Acpi Bios