Acer Aspire 4520g Service Guide

Chapter 245
The table below describes the parameters in this screen. Settings in boldface are the default and suggested 
parameter settings.
NOTE:  When you are prompted to enter a password, you have  three tries before the system halts. Don’t forget 
your password. If you forget your password, you ma y have to return your notebook computer to your 
dealer to reset it.
Setting a Password
Follow these steps as you set the supervisor, user, or hard disk password:
1. Use the  w and  y keys to highlight the...

46Chapter 2
Removing a Password
Follow these steps:
1.Use the  w and  y keys to highlight the Set Supervisor Password parameter and press the  e key. The 
Set Supervisor Password box appears:
2. Type the current password in the Enter Current Password field and press  e.
3. Press  e twice  without  typing anything in the Enter New Password and Confirm New Password fields. 
The computer then sets the Supervisor Password parameter to “Clear”.
4. When you have changed the settings, press  u to save the...

Chapter 247
If the new password and confirm new password strings do not match, the screen will display the following 
message. 

48Chapter 2
Boot
This menu allows the user to decide the order of boot devices to load the operating system. Bootable devices 
includes the diskette drive in module bay, the onbo ard hard disk drive, and the CD-ROM in module bay.
  Information
 
 
Item Specific Help  
 
 
 
 
   
  
  
    
   
Keys used to view or
configure devices :
Up and Down arrows 
select a device.
 and <
-> moves
the device up or down.
 and  specifies
the device fixed or 
removable. 
 exclude or include 
the device to boot....

Chapter 249
Power
The Power screen displays a summary of your computer power settings, and also includes advanced setup 
parameters. It allows the user to enable and dis able the power management options on the computer and 
specify standard power parameters for specific components.
The table below describes the parameters in this screen. Settings in  boldface are the default and suggested 
parameter settings.
ParameterDescriptionFormat/Option
C State Configuration
C1E Configuration
CPU Throttle...

50Chapter 2
PCI Clocks Enables, disables the PCI clock.Enabled or Disabled
AltVid Enables, disables the  Altvid function, to reduce 
processor voltage to the minimal operation level.
Disabled or Enabled
Power Saver
ASPM (L0s/L1)
Enabled or Disabled
ParameterDescriptionFormat/Option 

Chapter 251
Exit
The Exit screen contains parameters that help safeguard and protect your computer from unauthorized use.
The table below describes the parameters in this screen.
ParameterDescription
Exit Saving Changes Exit System Setup and save your changes to CMOS.
Exit Discarding Changes Exit utility without saving setup data to CMOS.
Load Setup Default Load default values for all SETUP item.
Discard Changes Load previous values from CMOS for all SETUP items.
Save Changes Save Setup Data to CMOS....

52Chapter 2
BIOS Flash Utility
The BIOS flash memory update is required for the following conditions:
TNew versions of system programs
TNew features or options
TRestore a BIOS when it becomes corrupted. 
Use the Phlash util ity to update the system BIOS flash ROM.
NOTE:  If you do not have a crisis recovery diskette at hand, then you should create a  Crisis Recovery 
Diskette  before you use the Phlash utility.
NOTE:  Do not install memory-related drivers (XMS , EMS, DPMI) when you use the Phlash.
NOTE:...

Chapter 353
This chapter contains step-by-step procedures on how to disass emble the notebook computer for 
maintenance and troubleshooting.
To disassemble the computer, you need the following tools:
TWrist grounding strap and conductive mat for preventing electrostatic discharge
TSmall Philips screw driver
TPhilips screwdriver
TPlastic flat head screw driver
TTw e e z e r s
NOTE:  The screws for the different components vary in size. During the disassembly process, group the 
screws with the...

54Chapter 3
General Information
Before You Begin
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. Remove the battery pack.