Acer Aspire 4720 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 may 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 Set...

46Chapter 2
5.When you are done, press u to save the changes and exit the BIOS Setup Utility.
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...

Chapter 247
If the current password entered does not match the actual current password, the screen will show you the 
Setup Warning.
If the new password and confirm new password strings do not match, the screen will display the following 
message.
Setup Warning
Invalid Password.
[Continue]
Setup Warning
Password do not match.
Re-enter password.
[Continue] 

48Chapter 2
Boot
This menu allows the user to decide the order of boot devices to load the operating system. Bootable devices 
includes the onboard hard disk drive, the CD-ROM in module bay, and any external USB device.
Phoenix TrustedCore(tm) Setup Utility
   
 
  
Item Specific Help 
Boot priority order:  
   
 
 
 
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...

Chapter 249
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 Defaults 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....

50Chapter 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 utility 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: Please...

Chapter 351
This chapter contains step-by-step procedures on how to disassemble 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 corresponding...

52Chapter 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. 

Chapter 353
Disassembly Procedure Flowchart
The flowchart on the succeeding page gives you a graphic representation on the entire disassembly sequence 
and instructs you on the components that need to be removed during servicing. For example, if you want to 
remove the system board, you must first remove the keyboard, then disassemble the inside assembly frame in 
that order.
Start
Thermal
DoorHDD Door
LCD Module
Middle Cover
HDD Bracket
Keyboard
Battery Pack
F*2 D*5
F*1
B*4
C*2 LCD hinges to logic
D*2...

54Chapter 3
Screw List
ItemDescriptionPart Number
A SCREW M2.0*3.0-I-NI-NYLOK  86.A08V7.005
B SCREW M2.5*4.0-I(NI)(NYLOK) 86.D01V7.001
C SCREW M2.5*3.5-I(BNI)(NYLOK)  86.AHS07.001
D SCREW M1.6*3-I(NI)(NYLOK) 86.AHS07.002
E SCREW M2.5 *7L-BNI-NYLOK 86.A10V7.006
LCD Module
LCD Inverter
LCD Panel
Wireless
Antenna Set
LCD Bezel
G*1 for 15
G*2 for 15.4 B*4
B*2
G*2 for 15.4
F*8 (4 on left; 4 on right)
LCD
Assembly
LCD CableLCD Bracket
Sets
LCD