Cleaning Bios Passwords | eMachines D720 guide

3.Reboot the system and key in the selected string (qjjg9vy, 07yqmjd etc.) for the BIOS user password.

Cleaning BIOS Passwords

To clear the password, 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 2

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eMachines D720 manual Cleaning Bios Passwords

Contents

EMachines D720/D520 Series Service Guide Revision History III Copyright Conventions Preface Page Table of Contents Viii 107 Model Definition and Configuration 142 Table of Contents Chapter Features Communication Power subsystemPrivacy control Special keys and controls System Block Diagram Front View Your Acer Notebook tourIcon Description Rear View Closed Front ViewHDD Icon Description Latch Locks and releases the lid Left View Right View Bottom View Icon Function Description Indicators Function Left Button Right Button Main TouchPad TouchPad Basics with fingerprint reader Lock Keys and embedded numeric keypad Using the Keyboard Key Description Windows Keys Hotkey Icon Function Description Hot Keys Special Key Euro symbolUS dollar sign Acer GridVista dual-display compatible Using the System Utilities Processor Specification Hardware Specifications and ConfigurationsICH9-M LAN Interface Specification System Memory SpecificationWireless Module 802.11b/g Specification Memory Combinations Slot Total Memory 8MB Hard Disk Drive Interface SpecificationSata Audio Interface Specification Super-Multi Drive Module SpecificationKeyboard Specification System Board Major Chips Controller LCD Specification Battery Specification Navigating the Bios Utility Bios Setup Utility Parameter Description Information Parameter Description Format/Option Main Parameter Description Submenu Items AdvancedLAN IDE IGD TV Aspm USBURR FER Security Disabled orParameter Description Option Clear or Set Removing a Password Setting a Password Changing a Password Emttm PowerDTS Acpi S3 IDE0 Hitachi HTS542516K9SA00 Boot Exit Saving Changes Exit Bios Flash Utilities USB HDD ABC USB Cdrom DOS Flash UtilityPage WinFlash Utility Remove HDD Password Remove HDD/BIOS Password Utilities Removing Bios Passwords Key in biospw 14452 Cleaning Bios Passwords Chapter Disassembly Requirements Machine Disassembly and Replacement Disassembly Process Pre-disassembly InstructionsGeneral Information Main Screw List Quantity Part Number External Modules Disassembly Flowchart External Module Disassembly ProcessScrew List Step Quantity Removing the Battery Pack Wlan HDD Removing the Lower CoversStep Size Quantity Screw Type Memory Cover M2.5*8 Remove the Wlan cover as shown Removing the Dimm Modules Step Size Quantity Screw Type Wlan Module M2*L3 Removing the Wlan Module Chapter Removing the Hard Disk Drive Module Step Size Quantity Screw Type HDD Carrier M3*3 Step Size Quantity Screw Type ODD Module M2.5*5 Removing the Optical Drive Module Step Size Quantity Screw Type ODD Bracket M2*L3 Main Unit Disassembly Process Step Size Quantity Screw Type Switch Cover M2.5*5 Removing the Switch Cover Chapter Removing the Keyboard Removing the Antenna Page Step Size Quantity Screw Type LCD Module M2.5*8 Removing the LCD Module Step Size Quantity Screw Type Step Size Quantity Screw Type Upper Cover M2.5*8 Removing the Upper CoverStep Size Quantity Screw Type Upper Cover M2.5*5 Disconnect a as shown Chapter Step Size Quantity Screw Type TouchPad Bracket M2*L3 Removing the TouchPad Bracket Chapter Removing the Speaker Modules Remove the Speaker Modules from the upper cover Removing the Power Board Step Size Quantity Screw Type Modem Module M2*L3 Removing the Modem Module Step Size Quantity Screw Type Mainboard M2.5*5 Removing the Main Board Chapter Step Size Quantity Screw Type Mainboard M2.5*4 Removing the CPU Fan Step Size Quantity Screw Type Thermal Module M2.5*6.5 Removing the Thermal Module Removing the CPU LCD Module Disassembly Process Step Size Quantity Screw Type LCD Bezel M2.5*5 Removing the LCD Bezel Step Size Quantity Screw Type Inverter Board M2.5*5 Removing the Inverter Board Step Size Quantity Screw Type Camera Module M2*L3 Removing the Camera Module Step Size Quantity Screw Type LCD Panel M2.5*5 Removing the LCD Panel Step Size Quantity Screw Type LCD Brackets M2*L3 Removing the LCD Brackets and FPC Cable Removing the Antennas Removing the MIC Module Replacing the LCD Panel LCD Module Reassembly ProcedurePage Chapter Page Replacing the LCD Bezel Replacing the CPU Main Module Reassembly ProcedureReplacing the Thermal Module Replacing the Mainboard Replacing the CPU Fan ModuleAlign the Fan Module on the screw brackets Replacing the Modem Module Replacing the Power Board Replacing the Speaker Module Chapter Replacing the Upper Case Replacing the TouchPad Bracket Chapter Replacing the LCD Module Chapter Replacing the Antenna Cable Replacing the Keyboard Replacing the Switch Cover Replacing the ODD Module Place the HDD in the HDD carrier Replacing the Hard Disk Drive Module Replacing the Dimm Modules Replacing the Wlan ModuleInsert the Wlan board into the Wlan socket Replace the Memory Cover Replace the Wlan Cover Replacing the Lower Covers Replacing the Battery Symptoms Verified Go To Common Problems Computer Shutsdown Intermittently Power On Issue No Post or Video No Display Issue Abnormal Video Display Random Loss of Bios Settings Built-In Keyboard Failure LCD Failure Internal Speaker Failure TouchPad Failure Sound Problems Select Set up microphone Microphone ProblemsInternal Microphone Failure Select Repair your computer HDD Not Operating CorrectlySelect Startup Repair ODD Not Operating Correctly ODD Failure Discs Do Not Play Drive Not Detected Modem Function Failure Wireless Function Failure External Mouse Failure Thermal Unit Failure Other Failures Undetermined Problems Intermittent ProblemsDimm Sec Post CodesMemory Code Description BDS & Specific action Each Driver entry point used in 80PORT Each Peim entry point used in 80PORT Bootpriority CF9RESETFvbservice Smbios Legacybiosplatform LegacybiosSetuputility Fwblockservice Each SmmDriver entry point used in 80PORT Top View Bottom View Clearing Password Check Clearing Password Check and Bios RecoverySteps for Clearing Bios Password Check Hardware Open Gap Description Bios Recovery Boot Block Bios Recovery by Crisis DiskBios Recovery Hotkey Steps for Bios Recovery from USB Storage FRU Field Replaceable Unit List Main Assembly EMachines D720/D520 Exploded DiagramsDescription Acer P/N LCD Panel EMachines D720/D520 FRU List CPU/Processor Category Description Acer Part NoMulti Drive Combo Drive Keyboard LCD Panel G 14.1 Wxga AUO B141EW04 Assy LCD Module 14.1 IN. Wxga Glare W/ANTENNA CCDLCD Panel G 14.1 Wxga Samsung LTN141W3-L01-J LCD Panel G 14.1 Wxga CMO N141I3-L02 Screw List Chapter 141 EMachines D720/D520 Series Appendix aModel Country Acer Part No Description China AAP TWN Gctwn Model Country Acer Part No Description CPU LCD Appendix a 148 571G12Mi 4KS 149 Appendix a 150 571G12Mi 4KS 151 Appendix a 152 Appendix B Test Compatible Components Microsoft Windows Vista Environment Test CPU Test Vendor Type DescriptionIntel Mvpqs Vendor Type Description HDD Test LAN Test Modem Test Vendor Type Description LCD TestNorthbridge Chipset Test ODD Test Wlan Test Southbridge Chipset Test 160 Appendix C Online Support Information 162 Index 164