CMOS password, is one of protection on your PC that will appear when the computer is booting (Appearing before the operation of the network or system password on windows). since CMOS is the governing Password hardware system work, it is impossible without passing the password to run the operating system.
CMOS setup usually you can do by pressing a control command on your keyboard before cmos process is completed, generally a command to enter the BIOS menu by pressing the Ctrl + ALT + DEL, F2 or any other command that will appear on the disply shows that the key wear. Some motherboards have a default password. For example, AMI BIOS default password is "AMI". Check your computer or motherboard manual for the default password.
problem that arises is what if oblivious to the Bios password?, there are some tricks to remove BIOS password on a common,
Debug commands
At the command prompt type debug - prompt where you
can type commands like-input below:
debug
A
MOV AX, 0
MOV AX, CX
OUT 70, AL
MOV AX, 0
OUT 71, AL
INC CX
CMP CX, 100
JB 103
INT 20
G
Q
Basic BIOS password crack
This debug command is a command to clear the BIOS settings to restore the same as in
when you are running a new PC, the CMOS does not ask for any password. At this command will return to the bios setup default
To remove the CMOS do the following: Get DOS prompt and
type:
DEBUG hit enter
-O 70 2e hit enter
-O 71 ff hit enter
-Q hit enter
exit hit enter
Restart the computer. This command usually works on most versions of the BIOS
AWARD
Accessing information on the hard disk
When you turn on the computer, immediately go into the CMOS setup menu
(Usually you have to press F2, or DEL, or CTRL + ALT + Del during the sequence
boot) and you will enter the CMOS SETUP TANDARD menu, and set the channel you have
ststus setup and set the hard disk as follows:
TYPE = Auto, MODE = AUTO, then SAVE & SETUP
EXIT.
Now you have access to the hard disk.
Using Password General Manufacturing
attempt to bypass the BIOS password is to try
backdoor password which is intended sebabagi standard password maker / manufacturer in general:
AWARD BIOS
AWARD SW, AWARD_SW, Award SW, AWARD PW, _award, awkward, J64, j256, j262, j332, j322, 01,322,222, 589 589, 589 721, 595 595, 598 598, HLT, SER,
SKY_FOX, Ally, Ally, Condo, CONCAT, TTPTHA, What?, HLT, KDD, ZBAAACA,
ZAAADA, ZJAAADC, djonet,% øåñòü ïpîáåëîâ%,% äåâÿòü ïpîáåëîâ%
AMI BIOS
AMI, AMI, AMI SW, AMI_SW, BIOS, PASSWORD, HEWITT RAND, Oder
Other passwords you may try (for AMI / AWARD or other BIOSes)
Lkwpeter, lkwpeter, BIOSTAR, biostar, BIOSSTAR, biosstar, ALFAROME, Syxz, Wodj
Note
that the keyboard key associated to the U.S. model with the
some European keyboards (such as Italy and Germany), so - for example -
You should type AWARD keyboard? SW when using them. Also remember that
password is case sensitive. The last two passwords in the AWARD BIOS list
located in Russia.
Flashing BIOS via software
If you have access to a computer when turned on, you can try
one of the programs that remove the password from the BIOS, by ignoring
access memory.
You can download on some web provider, but in theory there is software that menjalahkan removal orders may also be using the debug commands you better learn
how to do what they are doing it manually. You can reset
BIOS to default values using the MS-DOS tool DEBUG (type DEBUG at the
command prompt). You should do it in a pure MS-DOS mode, not
of MS-DOS shell window in Windows. Once you are in an environment
debug enter the following command:
AMI / AWARD BIOS
O 70 17
O 71 17
Q
PHOENIX BIOS
O 70 FF
O 71 17
Q
GENERIC
Invalidates the CMOS RAM.
Should work on all AT motherboards
(XT motherboards do not have CMOS)
O 70 2E
O 71 FF
Q
Note that the first letter is "O" not the number "0". The figures
follow are two bytes in hex format.
v Flashing BIOS via hardware
If you can not access the computer at the time, and the standard backdoor
password does not work, you have to flash the BIOS via hardware. Please read the notes
important at the end of this section before attempting any of the methods.
v Using penghunghubung (jumper)
Canonical way to flash BIOS via hardware is to plug, unplug, or remove the jumper on the motherboard (for "switching a jumper" you can find
jumper that connects the center of the locking pin CMOS password, you must
unplug the jumper and then plug it into the center pin and the pin on the side
opposite, so if the jumper is normally on position 1-2, you have to put in
2-3 positions, or vice versa). This jumper is not always located near the BIOS,
but could be anywhere on the motherboard
To find the correct jumper you should read the motherboard manual .. After
You find a jumper that is, switch it on (depending on the instruction manual).
The general procedure is: after you move or lift a jumper:
Restart the computer (to CPU through the BIOS startup), then turn off again and attach the jumper on; its original position, and turn it back on.
In some
motherboard will automatically reset and flashing the BIOS is open (no display on the monitor during the process) or in silence (do Flashing tampa show both the process) to be assured that you mungin if the process has run correctly.
If you do not have the motherboard manual you can try on a jumper near the CMOS IC, near the Battery or jumpers that may be somewhat hidden around
When moving or revoke Jumper done just make sure you change the jumper,
If after flashing the BIOS, the computer can not boot when you turn it on,
turn it off, and wait a few seconds before trying again.
Removing the battery
If you can not find the jumper to flash the BIOS or if
jumper is not there, you can delete the setup configuration in memory
BIOS battery life by letting go of the power supply for the system clock, on some motherboards use soldered directly to the battery on your motherboard and require soldering to solder the cable release, but if you're using the battery system motherboard plug, you just pull it.
After you remove the battery, let Bawa for
15-30 minutes or more, then reinstall and existing data into
BIOS memory will be lost. I recommend you to install the battery back in about an hour to be sure, much better to leave overnight before you reassemble batterynya
Important note: in laptop and notebook, you can not remove the BIOS configuration as the above, but you must
remove the CMOS battery from the motherboard. Short-circuiting the chip Another way to reset the CMOS RAM by performing short-circuit the two pins of the chip
BIOS for a few seconds. You can do it with a small piece of wire
electricity or a binder clip. Always make sure that the computer
turned OFF before attempting this operation, for detainya you can search according to type your motherboard on the internet
Removing the IC Chip
If nothing works, you can replace the existing BIOS chip with the
You can buy from the new specialty store in your electronic or computer supplier
You. This would be easier if its IC chip using the chip socket base, so you just do not pull out without soldering process
When Chip Bios for your type is not available on the market you can replace it with a kompitibel to your motherboard or your dapatr can buy blank flash chip itself by using the program EPROM, on some motherboards provide an upgrade version of the developer to motherboarnya (eg on ASUS that provides configuration Flashing on Motherboadnya for free),
Note: When BIOS flash is not only the password, but also all the other configuration data will be reset to factory defaults, so when you are booting for the first time after a BIOS flash,
You must enter the CMOS configuration menu (as described earlier) and
fix some things. Also when you boot Windows, it may happen that
discovered several new devices, because the new configuration of the BIOS, in the case
This you will probably need a Windows installation CD because Windows will
ask you for some external files. If Windows does not see the CD-ROM
try to remove and reinsert the CD-ROM again. If the Windows
can not find the CD-ROM drive and you are set up correctly from the
BIOS config, just reboot with the reset button, and run on Windows
The next must find it. But the file is most needed by the system
when installing new hardware could also be found in C: WINDOWS, C:
WindowsSystem, or C: WINDOWSINF.
v Key Disk for Toshiba laptops
Some Toshiba notebooks allow to bypass BIOS by inserting a "key-disk" on a floppy disk drive while booting. To make Keydisk Toshiba, requires 1.44Mb floppy disk or 720Kb, then use a hex editor such as Hex Workshop to change the first five bytes of the second sector (which is after the boot sector) and set them to 4B 45 59 00 00 (note that the first three bytes are the ASCII for "KEY" followed by two zeros). Once you've created the key disk put it in drive and turn on the notebook, then press the reset button and when asked the password, press Enter. You will be asked to Set Password again. Press Y and Enter. You will be prompted to enter the BIOS configuration where you can set a password
new.
General Handling
There are several ways to reset the cmos, here are some general handling
1.default common passwords, such as: At boot-up note
BIOS provider (Award, AMI, Phoenix, IBM, etc.)
For Award BIOS backdoor passwords you can try this:
AWARD_SW
j262
HLT
SER
SKY_FOX
BIOSTAR
ALFAROME
Lkwpeter
j256
AWARD? SW
Lkwpeter
syxz
ALLY
589 589
589 721
awkward
Concat
d8on
Condo
j64
szyx
For AMI BIOS you can try this backdoor password:
AMI
BIOS
PASSWORD
HEWITT RAND
AMI? SW
AMI_SW
Lkwpeter
A.M.I.
Condo
For PHOENIX BIOS backdoor passwords you can try this:
phoenix
for details you can see in
Default Password List
2. On some older PC's pressing the insert key upon startup will clear the CMOS, make sure you hold it down until finished boot.
3. Another way that we've covered quite a lot, is to attract metallic nickel looking battery that supplies power to the CMOS.
4. Some times there is a small three pin jumper used to reset the bios, just move the black little pin cover to the two opposite pin. (Be sure to read the manual before this motherboard
5). If the battery is soldered, you can take the solder to it but I do not recommend it unless you're a professional.
6. There are several programs on the net that is made to solve some kind of bios passwords, I have one for award BIOS here are some:
http://www.11a.nu/ibios.htm
http://natan.zejn.si/rempass.html
Literature references
http://www.astalavista.com/library/basics/guides/bios_hacking.txt
http://www.virtualplastic.net/html/misc_bios.html
Tools:
http://www.red-demon.com/pwrecovery.html
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