Acer Travelmate 4220 Service Guide

55Chapter 2
BIOS Password Removal
1.Press  to enter Setup during POST
2. Go to the “Main” menu
3. Enable the “F12 Boot Menu” function.
4. Press F10 to save the setting and exit.
5. Press F12 during POST
6. Select “USB Floppy” from the Boot Menu 
7. Please use a USB disk that can boot from  DOS mode and execute the BIOS_PW.exe file.
PhoenixBIOS Setup Utility
Information
MainSecurity Boot Exit
Item Specific Help
System Time:
[11:59:38]
System Date:[03/14/2006]
System Memory: 640 KB
Extended Memory: 502...

Chapter 256 

57Chapter 2 

Chapter 357
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...

58Chapter 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.
NOTE:  There are several types of screws used to secure  bottom case and upper case assembly. The screws 
vary in length. Please refer the picture below, gr oup the same type of screws together during service...

Chapter 359
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 main board, you must first remove the ke yboard, then disassemble the inside assembly frame in 
that order. 

60Chapter 3
Removing the Adapter and Battery Pack
1.Unplug the adapter.
2. Release the battery lock.
3. Slide the battery latch.
4. Remove the battery pack.
 
  

Chapter 361
Removing the TV Tuner, Heatsink Module, CPU, and HDD 
Module
Remove the Heatsink Cover
1. Release the six screws securing the heatsink cover. (The six screws are attached to the heatsink cover)
2. Lift the heatsink cover up and remove it.
Remove the TV Tuner Card(for selected models)
1.Disconnect the TV tuner cable and antenna from the TV tuner card.
2. Press the left and right latch to release the TV tuner card.
3. Disconnect the TV tuner cable and antenna from the TV board.
Remove the...

62Chapter 3
3.Remove the heatsink module from the main unit.
Removing the HDD Module
1.Release the two screws securing the HDD cover.  (One screw is attached to the HDD cover)
2. Remove the HDD cover.
.
3.Remove the screw securing the HDD. 
4. Holding the mylar and pull the HDD  module out of the main unit.
Removing the CPU
1.Use a flat screw driver and turn the screw driver counterclockwise to unlock the CPU.
2. Remove the CPU from the mainboard. 

Chapter 363