Acer Aspire One Model Nav Service Guide

							Chapter 231
NOTE: If the AC power is not connected, the following message displays.
Plug in the AC power to continue.
5.Flash is complete when the message Flash programming complete displays.  
						

							32Chapter 2
WinFlash Utility
Perform the following steps to use the WinFlash Utility:
1.Double click the WinFlash executable.
2.Click OK to begin the update. A progress screen displays.
3.When the process is complete, close all programs and applications and reboot the system. 
						

							Chapter 233
Remove HDD/BIOS Password Utilities
This section provides you with details about removing HDD/BIOS password methods:
Removing HDD Password:
If you key in the wrong HDD password three times, an error is generated.
To reset the HDD password, perform the following steps:
1.After the error is displayed, select the Enter Unlock Password option on the screen.
2.An Encode key is generated for unlocking utilities. Note down this key.
3.Execute the UnlockHD.EXE file to create the unlock code in DOS Mode using the format UnlockHD  
[Encode key] with the code noted in the previous step, as follows:
UnlockHD  76943488
4.The command generates a password which can be used for unlocking the HDD.
Password :  46548274
5.Key in the password from the previous step to unlock the HDD as shown. 
						

							34Chapter 2
Removing BIOS Passwords:
To clear the User or Supervisor passwords, open the RAM door and use a metal instrument to short the U72 
jumper as shown below.
Cleaning BIOS Passwords
To clean the User or Supervisor passwords, perform the following steps:
1.From a DOS prompt, execute clnpwd.exe
2.Press 1 or 2 to clean the desired password shown on the screen.
The onscreen message determines whether the function is successful or not. 
						

							Chapter 235
Miscellaneous Utilities
Using Boot Sequence Selector
Boot Sequence Selector allows the boot order to be changes without accessing the BIOS. To use Boot 
Sequence Selector, perform the following steps:
1.Enter into DOS.
2.Execute BS.exe to display the usage screen.
3.Select the desired boot sequence by entering the corresponding sequence, for example, enter BS2 to 
change the boot sequence to HDD|CD ROM|LAN|Floppy.
Using DMITools
The DMI (Desktop Management Interface) Tool copies BIOS information to eeprom to be used in the DMI pool 
for hardware management. 
When the BIOS displays Verifying DMI pool data it is checking the table correlates with the hardware before 
sending to the operating system (Windows, etc.).
To update the DMI Pool, perform the following steps:
1.Enter into DOS.
2.Execute dmitools.exe. The following messages show dmitools usage:
DMITOOLS [ /R | /WP | /WS | /WU ] [ STRING ]
• dmitools /r ==> Read dmi string from bios
• dmitools /wm xxxx ==> Write manufacturer name to eeprom
• dmitools /wp xxxx ==> Write product name to eeprom
• dmitools /ws xxxx ==> Write serial number to eeprom
• dmitools /wu xxxx ==> Write uuid to eeprom
• dmitools /wa xxxx ==> Write asset tag to eeprom
IMPORTANT:The following write examples (2 to 5) require a system reboot to take effect 
						

							36Chapter 2
Example 1: Read DMI Information from Memory
Input: 
dmitools /r 
Output:
Manufacturer (Type1, Offset04h): Acer
Product Name (Type1, Offset05h): Aspire one xxxxx
Serial Number (Type1, Offset07h): 01234567890123456789
UUID String (Type1, Offset08h): xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
Asset Tag (Type3, Offset04h): Acer Asstag
Example 2: Write Product Name to EEPROM
Input:
dmitools /wp Acer
Example 3: Write Serial Number to EEPROM
Input:
dmitools /ws 01234567890123456789
Example 4: Write UUID to EEPROM (Create UUID from Intel WFM20.pdf)
Input:
dmitools /wu
Example 5: Write Asset Tag to EEPROM
Input:
dmitools /wa Acer Asstag
Using the LAN MAC Utility
Perform the following steps to write MAC information to eeprom:
1.Use a text editor, for example Notepad, to edit the MAC.CFG file as shown:
• WriteData= 001122334455 
						

							Chapter 237
3.Execute MAC.BAT to write MAC information to eeprom.  
						

							38Chapter 2 
						

							Chapter 339
Machine Disassembly and Replacement
This chapter contains step-by-step procedures on how to disassemble the notebook computer for 
maintenance and troubleshooting.
Disassembly Requirements
To disassemble the computer, you need the following tools:
•Wrist grounding strap and conductive mat for preventing electrostatic discharge
•Flat screwdriver
•Philips screwdriver
•Plastic flat screwdriver
•Plastic tweezers
NOTE: The screws for the different components vary in size. During the disassembly process, group the 
screws with the corresponding components to avoid mismatch when putting back the components.
Related Information
The product previews seen in the disassembly procedures may not represent the final product color or 
configuration.
IMPORTANT: Cable paths and positioning may not represent the actual model. During the removal and 
replacement of components, ensure all available cable channels and clips are used and that the cables are 
replaced in the same position.
Chapter 3 
						

							40Chapter 3
General Information
Pre-disassembly Instructions
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.Place the system on a flat, stable surface. 
4.Remove the battery pack.
Disassembly Process
The disassembly process is divided into the following sections:
•External components disassembly
•Main unit disassembly
•LCD module disassembly
The flowcharts provided in the succeeding disassembly sections illustrate the entire disassembly sequence. 
Observe the order of the sequence to avoid damage to any of the hardware components. For example, if you 
want to remove the Mainboard, you must first remove the Keyboard, and LCD Module then disassemble the 
inside assembly frame in that order.
Main Screw List 
ScrewQuantityPart Number
M2*3 ZK NL 18 86.SAS02.001
M2*4 ZK NL CR3 17 86.SAS02.002
M2*6 ZK NL CR3 12 86.SAS02.004
M3*3 NI 4 86.SAS02.006