Les fabriquants de bios prévoient souvent des portes dérobées pour accéder aux bios alors que ceux-ci sont protégés par des mots de passe … bien utile pour s’eviter un démontage suivi de son clear CMOS …
En voici une liste :

Backdoor Passwords

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.

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.

Award BIOS backdoor passwords:

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

AMI BIOS Backdoor Passwords:

AMI	 	BIOS	 	PASSWORD	 	HEWITT RAND
AMI?SW	 	AMI_SW	 	LKWPETER	 	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