I copied this info from a website since it needs a very particular solution. The only time I had to use it, it worked.
Go to setup (if it lets you) and check the BIOS brand and version.
(If you cant do anything due to the password, then you need some hardware to do that). I hope this helps
AMI Backdoor BIOS Passwords
Reported AMI backdoor BIOS passwords include A.M.I., AAAMMMIII,
AMI?SW , AMI_SW, BIOS, CONDO, HEWITT RAND, LKWPETER, MI,
and PASSWORD.
Award Backdoor BIOS Passwords
One reported Award backdoor BIOS password is eight spaces. Other
reported Award backdoor BIOS passwords include 01322222, 589589,
589721, 595595, 598598 , ALFAROME, ALLY, ALLy, aLLY, aLLy, aPAf, award,
AWARD PW, AWARD SW, AWARD?SW, AWARD_PW, AWARD_SW, AWKWARD, awkward,
BIOSTAR, CONCAT, CONDO, Condo, condo, d8on, djonet, HLT, J256, J262,
j262, j322, j332, J64, KDD, LKWPETER, Lkwpeter, PINT, pint, SER,
SKY_FOX, SYXZ, syxz, TTPTHA, ZAAAADA, ZAAADA, ZBAAACA, and ZJAAADC.
Phoenix Backdoor BIOS Passwords
Reported Phoenix BIOS backdoor passwords include BIOS, CMOS, phoenix,
and PHOENIX.
Backdoor BIOS Passwords from Other Manufacturers
Reported BIOS backdoor passwords for other manufacturers include:
Manufacturer
BIOS 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
SOYO
SY_MB
TMC
BIGO
Toshiba
Toshiba
Remember that what you see listed may not be the actual backdoor BIOS
password, this BIOS password may simply have the same checksum as the
real backdoor BIOS password. For Award BIOS, this checksum is stored at
F000:EC60.
Resetting the BIOS Password using Software
Every system must store the BIOS password information somewhere. If
you are able to access the machine after it has been booted
successfully, you may be able to view the BIOS password. You must know
the memory address where the BIOS password is stored, and the format in
which the BIOS password is stored. Or, you must have a program that
knows these things.
You can write your own program to read the BIOS password from the
CMOS memory on a PC by writing the address of the byte of CMOS memory
that you wish to read in port 0x370, and then reading the contents of
port 0x371.
!BIOS will recover the BIOS password
for most common BIOS versions, including IBM, American Megatrends Inc,
Award and Phoenix.
CmosPwd will recover the BIOS password for the
following BIOS versions:
- ACER/IBM BIOS
- AMI BIOS
- AMI WinBIOS 2.5
- Award 4.5x/4.6x/6.0
- Compaq (1992)
- Compaq (New version)
- IBM (PS/2, Activa, Thinkpad)
- Packard Bell
- Phoenix 1.00.09.AC0 (1994), a486 1.03, 1.04, 1.10 A03, 4.05 rev
1.02.943, 4.06 rev 1.13.1107
- Phoenix 4 release 6 (User)
- Gateway Solo - Phoenix 4.0 release 6
- Toshiba
- Zenith AMI