Acer Travelmate 5520g Service Guide

							Chapter 4121
Intermittent Problems
Intermittent system hang problems can be caused by a variety of reasons that have nothing to do with a 
hardware defect, such as: cosmic radiation, electrostatic discharge, or software errors. FRU replacement 
should be considered only when a recurring problem exists.
When analyzing an intermittent problem, do the following:
1.Run the advanced diagnostic test for the system board in loop mode at least 10 times.
2.If no error is detected, do not replace any FRU.
3.If any error is detected, replace the FRU. Rerun the test to verify that there are no more errors.  
						

							122Chapter 4
Undetermined Problems
The diagnostic problems does not identify which adapter or device failed, which installed devices are incorrect, 
whether a short circuit is suspected, or whether the system is inoperative.  
Follow these procedures to isolate the failing FRU (do not isolate non-defective FRU).
NOTE: Verify that all attached devices are supported by the computer.
NOTE: Verify that the power supply being used at the time of the failure is operating correctly. (See “Power 
System Check” on page 105.):
1.Power-off the computer.
2.Visually check them for damage. If any problems are found, replace the FRU.
3.Remove or disconnect all of the following devices:
Non-Acer devices
Printer, mouse, and other external devices
Battery pack
Hard disk drive
DIMM 
CD-ROM/Diskette drive Module
PC Cards
4.Power-on the computer.
5.Determine if the problem has changed.
6.If the problem does not recur, reconnect the removed devices one at a time until you find the failing FRU.
7.If the problem remains, replace the following FRU one at a time. Do not replace a non-defective FRU:
System board
LCD assembly 
						

							Chapter 5123
Top View
No.DescriptionNo.Description
1 Power Cable Connector  5 Fingerprint/Touchpad 
Connector
2 LCD Cable Connector 6 Bluetooth Connector
3 Touchpad Board Connector 7 Speaker Connector
4 Keyboard Connector
Jumper and Connector Locations
Chapter 5 
						

							124Chapter 5
Bottom View
No.DescriptionNo.Description
1CPU 7USB Connector
2 SATA Connector 8 Card Reader 
3 PC Card Reader 9 Line-out jack
4 LAN Connector 10 Mic-in jack
5 CRT Connector 11 Headphone jack
6 1394 Connector 
						

							Chapter 5125
Standard Operation Procedures of Password Bypassing and BIOS Recovery
Bios/KBC update :
The firmware are combined into one binary file and support both DOS and Windows mode update
- DOS mode
DO make sure you have plugged in the AC adapter to prevent flashing failure.
Before flashing the BIOS, you should unzip the compressed file to one directory.
a.Plug in the AC adapter.
b.Unzip HIC100WW to C: HIC100WW.
c.Boot to pure DOS.
d.It is better not to load HIMEM.sys (bypass CONFIG.sys).
e.To flash the BIOS by Phoenix flash utility, use *.wph ROM file to update the BIOS via the following 
command: C: HIC100WW \POM.BAT
- Windows mode
DO make sure you have plugged in the AC adapter to prevent flashing failure.
Before flashing the BIOS, you should unzip the compressed file to one directory.
a.Unzip HIC100WW to C: HIC100WW
b.Plug in the AC adapter.
c.Boot to pure Windows.
d.To flash the BIOS by WFlash utility to update the BIOS via double click C: HIC100WW \Windows 
BIOSV1.00.exe
Password Bypassing and Bios Recovery :
For RD and CSD to debug easily, TM5520/TM5220/EX5420/EX5120/TM7520/TM7220/EX7420/EX7120 
provides one hardware PIN pad for Bypassing Password Check, and one Hotkey to enable BIOS Recovery.
1.PIN pad : To short PIN pad to bypass password check.
2.Hotkey to enable BIOS Recovery: Fn+ESC, then Power Button, AC+DC coexistence is strongly 
recommended.
Bypassing Password Check : If the user has set Password (power-on or setup password) for security reason, 
BIOS will check password during POST or when entering the BIOS setup menu. However, if it is necessary to 
ignore the password check, the user may enable short PIN Pad to bypass password check.
BIOS Recovery: Boot Block is a special block of BIOS. It is used to boot up the system with minimum BIOS 
initialization. The user can enable this feature to restore the BIOS to a successful one if previous BIOS flashing 
process fails. 
						

							126Chapter 5
PIN pad Location
The system board provides one hardware Pin pad under the keyboard pad. RD/CSD can enable this function 
by shorting this pad. The  Pin Pad location should look as the figure below. 
1.Clear Password
PIN Pad: Bypassing Password Check
Keep shorting the 2 triangle PIN pad as shown above and then powering on the system will force the BIOS to 
clear Supervisor and User passwords. 
2.Clearing HDD password: 
To decode HDD password error code for unlocking hard disk in a DOS environment. 
A\> unlock6 XXXXX  00
XXXXX - HDD password error code   
Unlock6.exe v1.1 2 May 2003
Choice what kind of the password to be generated:
0.) Exit
1.) Scan code
2.) upper case ASCII Code
3.) Lower case ASCII code
Enter your choice:2  (Choose 2)
XXXXXXX
XXXXXXX
XXXXXXX
Those passwords are master password.
3.Restoring the BIOS through the Crisis Disk 
						

							Chapter 5127
Enable this function by pressing Fn+ESC, and the Power Button. To use this function, it is strongly 
recommended that the AC adapter is plugged and battery is inserted into the battery slot. If this function is 
enabled, the system will force the BIOS to enter into a special BIOS block, called BootBlock. RD/CSD can use 
this special BIOS code to recover the BIOS to a successful one if previous BIOS flashing process fails. 
However, before doing this, one Crisis Disk should be prepared in WinXP. Follow the steps below:
a.Prepare the Crisis Disk in WinXP (Crisis Disk will be released when BIOS V1.00 is released)
b.Insert the Crisis Disk to a USB floppy drive which is attached to the failed machine.
c.On the power-off state, press Fn+ESC, hold them, then press the power button. The system should 
be powered on with Crisis Recovery process.
d.BootBlock BIOS starts to restore the failed BIOS code. Short beeps should be heard when flashing. 
e.If the flashing process is finished, a long beep should be heard.
f.Power down the system when the above steps is finished.
If the crisis recovery process is finished, the system should be powered on with a successful BIOS. RD/CSD 
can then update the BIOS to a workable one by regular BIOS flashing process. 
						

							128Chapter 5 
						

							Chapter 6129
This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of TravelMate 5710/5310 and 
Extensa 5610/5210. Refer to this chapter whenever ordering for parts to repair or for RMA (Return Merchandise 
Authorization).
Please note that WHEN ORDERING FRU PARTS, you should check the most up-to-date information available on your 
regional web or channel. For whatever reasons a part number change is made, it will not be noted on the printed Service 
Guide.  For ACER AUTHORIZED SERVICE PROVIDERS, your Acer office may have a DIFFERENT part number code from 
those given in the FRU list of this printed Service Guide. You MUST use the local FRU list provided by your regional Acer 
office to order FRU parts for repair and service of customer machines.
NOTE: To scrap or to return the defective parts, you should follow the local government ordinance or regulations on how to 
dispose it properly, or follow the rules set by your regional Acer office on how to return it.
FRU (Field Replaceable Unit) List
Chapter 6 
						

							130Chapter 6
TravelMate 5520/5520G/5220/5220G Exploded 
Diagram
TravelMate 5520/5520G/5220/5220G FRU List
CategoryNo.Part Name and DescriptionAcer Part No.
Adapter
ADAPTER 90W DELTA ADP-90SB 
BBDARAP.09001.010
ADAPTER 90W DELTA ADP-90SB 
BBEA LFAP.09001.013
ADAPTER 90W LITEON PA-1900-
04WRAP.09003.005
ADAPTER 90W LITEON PA-1900-
24ARAP.09003.011
Battery-