Acer Aspire 4920 Service Guide

Chapter 241
BIOS Setup Utility
The BIOS Setup Utility is a hardware configuration program built into your system’s BIOS (Basic Input/Output 
System). Since most systems are already properly configured and optimized, there is no need to run this utility. 
The BIOS setup utility stores basic settings for your system. You will need to run this utility if you encounter 
configuration problems. Refer to Chapter 4 Troubleshooting when problem arises.
Entering BIOS Setup
Power on the system to start the system...

42Chapter 2
Information Menu
  
NOTE: The system configuration information varies in different models.
ParameterDescription
CPU Type Type of processor currently installed in the system.  
CPU Speed Speed of the processor currently installed in the system.
IDE0 Model Name Model name of HDD installed on the primary IDE channel.
IDE0 Serial Number Serial number of HDD installed on the primary IDE channel.
ATAPI Model Name Model name of the ATAPI CD/DVD-ROM drive installed in the system.
System BIOS Version...

Chapter 243
Main Menu
 
ParameterDescriptionFormat/Option
System Time Set the system time following the hour-minute-second format. Format: HH:MM:SS 
(hour:minute:second) 
System Date Set the date following the weekday-month-day-year format. Format MM/DD/YYYY 
(month/day/year) 
System Memory Total size of  system memory detected during POST. 
Extended Memory Total size of extended memory during POST. 
Video Memory Total size of VGA memory.
Quiet Boot When Enabled, the BIOS splash screen is displayed...

44Chapter 2
Security Menu
 
NOTE: Refer to the “Removing a System Password” section for more information on how to remove a 
password.
ParameterDescriptionOption
Supervisor Password Is Indicates whether a supervisor password has been 
assigned. 
Clear or Set
User Password Is Indicates whether a user password has been 
assigned.
Clear or Set
HDD Password Is Indicates whether a hard disk drive password has 
been assigned. 
Clear or HDD Password Set
Set Supervisor Password Press Enter to configure the...

Chapter 245
Setting a System Password
1.Use the up/down keys to select a password parameter (Set Supervisor Password, Set User Password, or 
Set Secondary MAS.Disk Password), then press Enter. A Password box will appear.
2.Type a password then press Enter. 
The password may consist of up to six alphanumeric characters (A-Z, a-z, 0-9).
3.Retype the password to verify the first entry then press Enter again. 
4.Press F10.
5.Select Ye s to save the new password and close the Setup Utility. 
Changing a System...

46Chapter 2
Boot Menu
This menu allows you to set the drive priority during system boot-up. The system will attempt to boot from the 
first device on the list. If the first device is not available, it will continue down the list until it reaches an available 
device. BIOS setup will display an error message if the drive(s) specified is not bootable. 
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Chapter 247
Exit Menu
ParameterDescription
Exit Saving Changes Save changes made and close the BIOS setup.
Exit Discarding Changes Discards changes made and close the BIOS setup.
Load Setup Defaults Loads the default settings for all BIOS setup parameters. Setup Defaults are quite 
demanding in terms of resources consumption. If you are using low-speed memory chips or 
other kinds of low-performance components and you choose to load these settings, the 
system might not function properly.
Discard Changes...

48Chapter 2
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Chapter 349
This chapter contains step-by-step procedures on how to disassemble the notebook computer for 
maintenance and troubleshooting.
Disassembly Requirements
To disassemble the computer, you need the following tools:
TWrist grounding strap and conductive mat for preventing electrostatic discharge
TFlat screwdriver
TPhilips screwdriver
THex screwdriver
TPlastic flat-blade screwdriver
TPlastic tweezers
NOTE: The screws for the different components vary in size. During the disassembly process, group...

50Chapter 3
General Information
Pre-disassembly Instructions
Before proceeding with the disassembly procedure, make sure that you do the following:
1.Turn off the power to the system and all peripherals.
2.Unplug the AC adapter and all power and signal cables from the system. 
3.Place the system on a flat, stable surface. 
4.Remove the battery pack.  See “Removing the Battery Pack” on page 53.
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