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How to Bypass BIOS Passwords
Written by [Üye Olmadan Linkleri Göremessin! Üye Olmak İçin Tıkla...]
Tuesday, 28 September 2004



DISCLAIMER




This article is intended for IT Professionals and systems administrators with experience servicing computer hardware. It is not intended for home users, hackers, or computer thieves attempting to crack the password on a stolen PC. Please do not attempt any of these procedures if you are unfamiliar with computer hardware, and please use this information responsibly. LabMice.net is not responsible for the use or misuse of this material, including loss of data, damage to hardware, or personal injury.





Before attempting to bypass the BIOS password on a computer, please take a minute to contact the hardware manufacturer support staff directly and ask for their recommended methods of bypassing the BIOS security. In the event the manufacturer cannot (or will not) help you, there are a number of methods that can be used to bypass or reset the BIOS password yourself. They include:

Using a manufacturers backdoor password to access the BIOS

Use password cracking software

Reset the CMOS using the jumpers or solder beads.

Removing the CMOS battery for at least 10 minutes

Overloading the keyboard buffer

Using a professional service

Please remember that most BIOS passwords do not protect the hard drive, so if you need to recover the data, simply remove the hard drive and install it in an identical system, or configure it as a slave drive in an existing system. The exception to this are laptops, especially IBM Thinkpads, which silently lock the hard drive if the supervisor password is enabled. If the supervisor password is reset without resetting the and hard drive as well, you will be unable to access the data on the drive.


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Backdoor passwords / Arkakapı Giriş Şifreleri

Many BIOS manufacturers have provided backdoor passwords that can be used to access the BIOS setup in the event you have lost your password. These passwords are case sensitive, so you may wish to try a variety of combinations. Keep in mind that the key associated to "_" in the US keyboard corresponds to "?" in some European keyboards. Laptops typically have better BIOS security than desktop systems, and we are not aware of any backdoor passwords that will work with name brand laptops.

WARNING: Some BIOS configurations will lock you out of the system completely if you type in an incorrect password more than 3 times. Read your manufacturers documentation for the BIOS setting before you begin typing in passwords

UYARI: Bazı BIOS konfigürasyonları 3 kereden fazla yanlış şifre denediğinizde
sistemi tümüyle kilitler.Üretici firma kitapçığınızı şifreleri denemeye başlamadan önce lütfen okuyun.




Award BIOS backdoor passwords:

ALFAROME
ALLy
aLLy
aLLY
ALLY
aPAf
_award
AWARD_SW
AWARD?SW
AWARD SW
AWARD PW
AWKWARD
awkward BIOSTAR
CONCAT
CONDO
Condo
d8on
djonet
HLT
J64
J256
J262
j332
j322 KDD
Lkwpeter
LKWPETER
PINT
pint
SER
SKY_FOX
SYXZ
syxz
shift + syxz
TTPTHA
ZAAADA
ZBAAACA
ZJAAADC
01322222
589589
589721
595595
598598

AMI BIOS backdoor passwords:

AMI
AAAMMMIII
BIOS
PASSWORD
HEWITT RAND
AMI?SW
AMI_SW
LKWPETER
A.M.I.
CONDO

PHOENIX BIOS backdoor passwords:

phoenix, PHOENIX, CMOS, BIOS

MISC. COMMON PASSWORDS

ALFAROME
BIOSTAR
biostar
biosstar
CMOS
cmos LKWPETER
lkwpeter
setup
SETUP
Syxz
Wodj

OTHER BIOS PASSWORDS BY MANUFACTURER

Manufacturer Password
VOBIS & IBM merlin
Dell Dell
Biostar Biostar
Compaq Compaq
Enox xo11nE
Epox central
Freetech Posterie
IWill iwill
Jetway spooml
Packard Bell bell9
QDI QDI
Siemens SKY_FOX
TMC BIGO
Toshiba Toshiba

TOSHIBA BIOS

Most Toshiba laptops and some desktop systems will bypass the BIOS password if the left shift key is held down during boot

IBM APTIVA BIOS

Press both mouse buttons repeatedly during the boot


If all else fails, check out the default passwords list.

(DEFAULT PASSWORD LİSTESİ YAZININ SONUNDA VERİLMİŞTİR) (1)



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Password cracking software

The following software can be used to either crack or reset the BIOS on many chipsets. If your PC is locked with a BIOS administrator password that will not allow access to the floppy drive, these utilities may not work. Also, since these utilities do not come from the manufacturer, use them cautiously and at your own risk.

(PROGRAM LİNKLERİ YAZININ SONUNDA VERİLMİŞTİR) (2)

Cmos password recovery tools 3.1
!BIOS (How-to included in zip)
RemPass
KILLCMOS (turn off virus scanner first before downloading)


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Using the Motherboard "Clear CMOS" Jumper or Dipswitch settings

Many motherboards feature a set of jumpers or dipswitches that will clear the CMOS and wipe all of the custom settings including BIOS passwords. The locations of these jumpers / dipswitches will vary depending on the motherboard manufacturer and ideally you should always refer to the motherboard or computer manufacturers documentation. If the documentation is unavailable, the jumpers/dipswitches can sometimes be found along the edge of the motherboard, next to the CMOS battery, or near the processor. Some manufacturers may label the jumper / dipswitch CLEAR - CLEAR CMOS - CLR - CLRPWD - PASSWD - PASSWORD - PWD. On laptop computers, the dipswitches are usually found under the keyboard or within a compartment at the bottom of the laptop.
Please remember to unplug your PC and use a grounding strip before reaching into your PC and touching the motherboard. Once you locate and rest the jumper switches, turn the computer on and check if the password has been cleared. If it has, turn the computer off and return the jumpers or dipswitches to its original position.


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Removing the CMOS Battery

The CMOS settings on most systems are buffered by a small battery that is attached to the motherboard. (It looks like a small watch battery). If you unplug the PC and remove the battery for 10-15 minutes, the CMOS may reset itself and the password should be blank. (Along with any other machine specific settings, so be sure you are familiar with manually reconfiguring the BIOS settings before you do this.) Some manufacturers backup the power to the CMOS chipset by using a capacitor, so if your first attempt fails, leave the battery out (with the system unplugged) for at least 24 hours. Some batteries are actually soldered onto the motherboard making this task more difficult. Unsoldering the battery incorrectly may damage your motherboard and other components, so please don't attempt this if you are inexperienced. Another option may be to remove the CMOS chip from the motherboard for a period of time.
Note: Removing the battery to reset the CMOS will not work for all PC's, and almost all of the newer laptops store their BIOS passwords in a manner which does not require continuous power, so removing the CMOS battery may not work at all. IBM Thinkpad laptops lock the hard drive as well as the BIOS when the supervisor password is set. If you reset the BIOS password, but cannot reset the hard drive password, you may not be able to access the drive and it will remain locked, even if you place it in a new laptop. IBM Thinkpads have special jumper switches on the motherboard, and these should be used to reset the system.


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Overloading the KeyBoard Buffer

On some older computer systems, you can force the CMOS to enter its setup screen on boot by overloading the keyboard buffer. This can be done by booting with the keyboard or mouse unattached to the systems, or on some systems by hitting the ESC key over 100 times in rapid succession.


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Jumping the Solder Beads on the CMOS

It is also possible to reset the CMOS by connecting or "jumping" specific solder beads on the chipset. There are too many chipsets to do a breakdown of which points to jump on individual chipsets, and the location of these solder beads can vary by manufacturer, so please check your computer and motherboard documentation for details. This technique is not recommended for the inexperienced and should be only be used as a "last ditch" effort.


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Using a professional service

If the manufacturer of the laptop or desktop PC can't or won't reset the BIOS password, you still have the option of using a professional service. Password Crackers, Inc., offers a variety of services for desktop and laptop computers for between $100 and $400. For most of these services, you'll need to provide some type of legitimate proof of ownership. This may be difficult if you've acquired the computer second hand or from an online auction.


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Links to Motherboard Manufacturers

If you need additional documentation about your motherboard, location of jumpers / dipswitches, location of the battery, BIOS settings, etc., we've included links to most of the major motherboard manufacturers here.

2 the Max
A-trend
Abit
American Megatrends
Amptron
Aopen
ASUS
Biostar
Chaintech Concord
Elite Computer Systems
Epox
FIC
Freetech
Giga-Byte
IBM
Intel Magic-Pro
Matsonic
Microstar
PC Chips
QDI
Siemens
SuperMicro
Tyan


Last Updated ( Wednesday, 03 November 2004 )


(1) DEFAULT PASSWORD LİSTESİ :

[Üye Olmadan Linkleri Göremessin! Üye Olmak İçin Tıkla...]


(2) YAZIDA BELİRTİLEN PROGRAMLARIN İNDİRME ADRESLERİ

Cmos password recovery tools 3.1
[Üye Olmadan Linkleri Göremessin! Üye Olmak İçin Tıkla...]

!BIOS (How-to included in zip)
RemPass
KILLCMOS (turn off virus scanner first before downloading / virüs tarayıcınızı bu dosyayı indirirken lütfen kapatın)

[Üye Olmadan Linkleri Göremessin! Üye Olmak İçin Tıkla...] adresinden download edilebilir.

KILLCMOS ile ilgili bir başka link :

[Üye Olmadan Linkleri Göremessin! Üye Olmak İçin Tıkla...]

If you have forgotten your CMOS password--there's no longer a need to worry! As long as you are able to boot from the floppy KILLCMOS will remove the password.
(Eğer bios şifrenizi unuttunuzsa kaygılanmayın.makinenizi disketle açın ve killcmos
programını çalıştırarak şifreyi sıfırlayın.)

NOTE: If you're running anti-virus software, it may detect a Trojan virus in the killcmos file. This is a mistake. There is NO virus in this file.
(Eğer antivirüs programı kullanıyorsanız Trojan olarak algılayacaktır. Bu bilgi doğru değildir.Dosyada virus bulunmamaktadır.)

KillCmos makinenizin biosunu fabrika ayarlarına döndürür ve şifre konulmuşsa şifreyi sıfırlar. Bütün bioslarla uyumludur ([Üye Olmadan Linkleri Göremessin! Üye Olmak İçin Tıkla...] sitesindeki açıklaması)

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