Acer Travelmate 4520 Service Guide

Chapter 221
5.Peel off the black tape near the DIMM slot to expose the SW1 dip switch.
6.Locate the G41 pin. 
7.Short the G41 pin to clear all system passwords. 
8.Reinstall the memory modules and the lower case cover. 
9.Turn on the computer and press F2 during bootup to access the Setup Utility. 
10.Press F9 to load the system defaults. 
11 .Press F10 to save the changes you made and close the Setup Utility. 
To clear a lost HDD password:
It uses on dos environment. To decode HDD password error code...

22Chapter 2
Boot
The Boot menu screen allows users to set the drive sequence in which Setup attempts to boot the operating 
system. By default, Setup searches for boot devices in the order shown in the screen below.
To set the boot drive sequence:
1.Press   or   to select a bootable device. 
2.Press F6 to move the device up the list, or F5 to move it down the list.
3.Press F10 to save the changes you made and close the Setup Utility. 
Acer TM 4520 SG.book  Page 22  Friday, June 22, 2007  5:43 PM 

Chapter 223
Exit
The Exit menu displays the several options on how to quit from the Setup Utility. Select any of the exit options
then press Enter.
OptionDescription
Exit Saving Changes Saves changes made and closes the Setup Utility. 
Keyboard shortcut: F10·
Exit Discarding Changes Discards changes made and closes the Setup Utility.
Load Setup Defaults   Loads the factory-default settings for all Setup fields. 
Keyboard shortcut: F9
Discard Changes Discards all changes made to the Setup Utility and...

24Chapter 2
BIOS Flash Utility
The BIOS flash memory update is required under the following conditions:
TWhen there are new versions of system programs
TWhen new hardware options are installed
TWhen the BIOS has been corrupted and you need to restore it 
BIOS Flash Precautions
TIf you do not have a crisis recovery diskette at hand, create a Crisis Recovery Diskette in Windows XP 
of Vista before you use the flash utility.
TDo not install memory-related drivers (XMS, EMS, DPMI) when you use the flash...

Chapter 225
Launch Manager 
Launch Manager allows users to configure three of the easy-launch keys—Acer Empowering, Web browser, 
and Mail.  
To configure an easy-launch key:
1.Select Start | All Programs | Launch Manager.
2.Select which key to configure, then click the Add button opposite it. 
3.You can set the key to open a particular file or program, or display a Web site address. Select the 
corresponding radio button, then type or browse for your selection.
4.If you’ve entered a Web site address,...

26Chapter 2
Acer TM 4520 SG.book  Page 26  Friday, June 22, 2007  5:43 PM 

Chapter 327
This chapter provides step-by-step instructions on how to disassemble the notebook computer for 
maintenance and troubleshooting purposes.
Disassembly Tools
In performing the disassembly process, you will need the following tools:
TWrist-grounding strap and conductive mat for preventing electrostatic discharge
TPhilips screwdriver
TFlat screwdriver
THex screwdriver
TFlat plastic screwdriver
TPlastic tweezers
Stages of the Disassembly Process
The disassembly process is divided into three...

28Chapter 3
System Screw List
Listed below are the screw types used in this system, plus their corresponding part numbers.
NOTE:  The screws for the different components vary in size. During the disassembly process, group the  
screws with their corresponding components to avoid mismatches when putting back the components.
Pre-disassembly Procedure
Before proceeding with the disassembly procedure, perform the steps listed below:
1.Turn off the power to the computer and all peripherals.
2.Unplug the power...

Chapter 329
External Modules Disassembly
External Modules Disassembly Flowchart
ScrewTy p ePart Number
A M2 x L8 BZN+NYLOK 86.00D75.220
B M2 x L4 BZN 86.00A02.140
C M2.5 x L8 BZN+NYLOK 86.00E34.738
D M2 x L4 BZN+NYLOK 86.00E13.524
E M3 x L4 86.9A554.4R0
F M2 x L3 BZN+NYLOK 86.00E25.723
G M2 x L2.5 BZN+NYLOK 86.00D72.620
Turn off 
computer and 
disconnect 
power cord
S D dummy cardEXpressCard 
dummy cardBa tte r y pa c kL-case cover 
(Ax1, Bx7, Cx1)
DIM MWLAN board
(Dx2)HDD a s s e m bl y
Ha r d dr i ve...

30Chapter 3
Removing the SD Dummy Card
1.Push against the card, as if you were pushing it further into the slot, letting the card spring out.  
2.Pull the SD dummy card out of its slot.
Removing the PC Card Dummy Card
1.Press the PC card slot eject button to pop it out, then press it again to eject the dummy card.
Acer TM 4520 SG.book  Page 30  Friday, June 22, 2007  5:43 PM