Acer Aspire 1420pt Service Guide

Chapter 231
BIOS Flash Utility
The BIOS flash memory update is required for the following conditions:
•New versions of system programs
•New features or options
•Restore a BIOS when it becomes corrupted. 
To run the BIOS flash utility:
1.Copy the BIOS flash tool and the BIOS into a USB flash disk.
2.Set the computer to boot from the USB flash disk. See “Boot” on page 29.
3.On boot-up enter at the DOS prompt:
C:\> flashit.exe v3106.fd /dc /beep:2000 

32Chapter 2
DOS Flash Utility
Perform the following steps to use the DOS Flash Utility:
1.Press F2 during boot to enter the Setup Menu.
2.Select Boot Menu to modify the boot priority order, for example, if using USB HDD to Update BIOS, move 
USB HDD to position 1.
3.Execute the FLASH.BAT batch file to update BIOS.
The flash process begins as shown.
4.In flash BIOS, the message Please do not remove AC Power Source displays.
NOTE: If the AC power is not connected, the following message displays.
Plug in...

Chapter 233
WinFlash Utility
Perform the following steps to use the WinFlash Utility:
1.Put the BIOS:ZE8_v3106.fd file under WinFlash file root.
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. 

34Chapter 2
Remove HDD/BIOS Password Utilities
This section provide you with removing HDD/BIOS method:
Remove HDD Password:
When the user keys in the wrong password three times, the system reports the following error code to user.
To unlock the HDD password, perform the following steps:
1.Press Enter to display the Select Item screen.
2.Select Enter Unlock Password and press Enter.
An Unlock Password displays.
3.Make a note of the key, 76943488 in the example.
4.Boot up the system to a removable bootable...

Chapter 235
Removing BIOS Passwords:
If you key in the wrong Supervisor Password three times, System Disabled displays on the screen. See the 
image below.
To reset the BIOS password, run clnpwd.exe as follows:
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. 

36Chapter 2
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...

Chapter 237
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...

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...

40Chapter 3
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...