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How to Reset a BIOS Password.

Desktop Machines.

In desktop machines its very simple.
Just remove the BIOS Battery from the motherboard and place it back after 1mint.

Laptop Machines.

It is some what difficult in laptop machines. Because it is not an eassy job to remove BIOS battery from the mother board. So i'm just explaining some most commen methods.
1. Using a Backdoor BIOS Password

The backdoor password is a BIOS password that works, no matter what the user sets the BIOS password to. These passwords are typically used for testing and maintenance. Manufacturers typically change the backdoor BIOS passwords from time to time.

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.

2. Resetting the BIOS Password using Software :

!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:

  • 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
3. Resetting the BIOS Password using Hardware :

If you cannot access the machine after if has been powered up, it is still possible to get past the BIOS password. The BIOS password is stored in CMOS memory that is maintained while the PC is powered off by a small battery, which is attached to the motherboard. If you remove this battery, all CMOS information (including the BIOS password) will be lost. You will need to re-enter the correct CMOS setup information to use the machine. The machines owner or user will most likely be alarmed when it is discovered that the BIOS password has been deleted.
On some motherboards, the battery is soldered to the motherboard, making it difficult to remove. If this is the case, you have another alternative. Somewhere on the motherboard you should find a jumper that will clear the BIOS password. If you have the motherboard documentation, you will know where that jumper is. If not, the jumper may be labeled on the motherboard. If you are not fortunate enough for either of these to be the case, you may be able to guess which jumper is the correct jumper. This jumper is usually standing alone near the battery. If you cannot locate this jumper, you might short both of the points where the battery connects to the motherboard.
If all else fails, you may have to clear the BIOS password by resetting the RTC (Real Time Clock) IC (Integrated Circuit) on your motherboard.
Many RTC's require an external battery. If your RTC is one of this type, you can clear the BIOS password just by unsocketing the RTC and reseating it.

4. Vendor Specific Solutions for Resetting the BIOS Password :
Resetting a Dell BIOS Password For information on how to recover a Dell BIOS password, please refer to How do I reset Dell BIOS password?
Resetting a Toshiba BIOS Password KeyDisk will reset the BIOS password on Toshiba laptops.

Some Toshiba's can be convinced to bypass the startup BIOS password if you hold down the key while booting the system.
Resetting an IBM ThinkPad BIOS Password For information on how to recover an IBM Thinkpad BIOS password, please refer to How do I reset an IBM ThinkPad BIOS password?
Resetting an IBM Aptiva BIOS Password Some IBM Aptiva's can be convinced to bypass the startup BIOS password if you press both mouse buttons repeatedly while booting the system.
Resetting an Acer BIOS Password For information on how to recover an Acer BIOS password, please refer to How do I reset an Acer BIOS password?

Thanks & Regards

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1 Answer

I have Panasonic CF 53. BIOS password.. I don't know how to remove.. please someone help me.

The methods to get around BIOS passwords are generally somewhat unique to the machine you have. Desktop models usually have motherboard pins that must be shorted to restore the BIOS to factory defaults. Laptops like yours often require being able to remove the CMOS battery on your motherboard while not connected to AC power or main battery. This generally requires some disassembly of your laptop, removal of the battery for some period of time (30 seconds to a minute usually works), then reinstallation of the CMOS battery. The CMOS battery is usually a coin-cell battery about the size of a nickel placed somewhere on the motherboard. It is NOT the laptop main battery. Look online for the service manual for your laptop. It will have the CMOS battery replacement instructions. If your laptop is more than a couple of years old, get a new battery and install it at the same time.

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como recupero la contrasena de my laptop

If the problem is in the BIOS and the computer is a "desktop" there is a "jumper" on the motherboard to be removed for one minute. On some PCs where's the "jumper" we must move left or right and leave it for a minute and then put it in its original place.
If it is a laptop depends on the year it was built and the people who made the machine. For example a machine made by Fujitsu has a code that only they provide. New laptop removed only battery maintaining settings and many of them are located in the back where is the WI-FI, In an older laptop is a bit more difficult, you have to open the machine find BIOS cross connection with a screwdriver across two contacts, while the machine is turned on for a minute.

Apr 27, 2014 | Computers & Internet

1 Answer

how can I reset the BIOS since will not restart after a bios upgrade

There are 2 ways you can reset your bios.

1. On the motherboard there is a small watch battery. Remove this battery along with the power cable from the power supply. Hold down the power button to fully discharge the system. Wait 2-3 minutes then reinstall the battery and plug in your system. Your reset is now complete

2. Some motherboards have a 3 pin jumper by the battery. Lets say that the jumper is on pins 2 and 3. Remove the jumper while the machine is OFF and place onto pins 1 and 2. Power on your machine for a minute. (Note: Your system will not POST). Shutdown your machine and put the jumper back to pins 2 and 3. Your reset is now complete

Any further questions feel free to ask.

Nov 19, 2010 | ASUS Eee Box B202 PC Desktop

1 Answer

where on the computer is the small battery in place?

depends if its a laptop or desktop pc
desktops have the battery ( bios back up battery) on the mainboard ( motherboard )

laptops are often found underneath the keyboard or deep inside the machine
make and model would help us to identify it further


Oct 23, 2009 | Computers & Internet

3 Answers

how do I reset cmos?

You need to located the jumper on your motherboard. Usually located near the battery. Just remove the jumper from the current location and place onto the other pins. You should see 3 pins after you remove the jumper. Pins 1 & 2 might of had the jumper on it. You then need to place the jumper on pins 2 & 3. Do this with the power off. Wait a few seconds and them place the jumper back on pins 1 & 2 and restart your computer.

Mar 28, 2009 | Computers & Internet

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