How to Clear a BIOS Password
The abbreviation BIOS means Basic Input/Output System. BIOS is a collection of commands that is contained within a ROM chip or it can be built into your motherboard or a device. It is also seen as a hard-coded software that controls the basic functions of input and output data. It ensures the proper functioning of a keyboard, mouse and monitor. It allows your central processing unit to communicate with the connected devices in a computer. Each hardware in your computer has a BIOS software that allows for communication between devices. Although there are different devices, each having its own BIOS, there is a main BIOS on your personal computer that is built inside a microchip. This microchip is inside your motherboard (main board). This BIOS allows your computer to run or boot up when you turn it on.
- BIOS software
- You can force the system to erase and reset the BIOS password to its default password. You can do this by removing the BIOS power/device and then replace it so that it can go back to its default password or no password at all. You will need to remove the power plug and remove a battery from the motherboard. In addition you can reset a jumper in the motherboard. The jumper can be found in pins #1 and #2 as the default position. You will have to shut down the computer, unplug the power cord, and move the jumper pins #1 and #2 over to pins #3 and #4 so that the password can be cleared.
If the jumpers are present on the motherboard you can do the following:
- Find the instruction booklet for your motherboard. If you cannot locate the booklet, then find some motherboard references on the internet so that you can get a manufacturer’s manual.
- Shut down your computer and unplug the power.
- Find the jumpers location; look for the present pin location and the location of the jumper on those pins to determine their default location.
- Afterwards, move the jumpers from the their default location; do an entire switch.
- When you make an entire switch, leave the jumpers in place for 20 to 30 seconds and then set it back into its default location.
- Plug in your power cord and restart the computer.
- When the computer starts up or boot0up, press the DEL, F10 or F1 key, so that you can view the Bios/CMOS setup.
- When you are in the Bios/CMOS setup, look for the setting for the Bios/CMOS to reset it to its default settings. This will allow the motherboard to either go back to its basic or optimum settings. To complete the process, you will need to verify certain settings, such a CPU and memory as well as hard drive type and size recognition.
- Ensure that you save your settings and restart the computer. The Bios password should be gone and the Bios set to its optimum settings.The methods for clearing a Bios/CMOS without jumpers is basically the same as clearing with jumpers.
- Shut down the computer and unplug the power.
- Get an instruction booklet for your mother board. You may be able to find the manufacturer’s booklet online.
- Find the battery in the motherboard. It is 1/2 inch in diameter.
- These batteries are firmly held into place with one or more small clips covering the face of the battery. Be careful when you lift the battery out of its socket and set it aside. Note: Some batteries are fused into the motherboard; therefore, be very careful and keen.
- Keep the battery out of the computer for about 20 to 30 minutes and then return it to its socket.
- Plug in the power cord back and restart the computer.
- When the computer boots or startup, select the DEL, F10 or F1 key, to view the Bios/CMOS setup.
- When you are in the Bios/CMOS setup, look for a section to set the Bios/CMOS to its default settings. This will return the motherboard to either its basic or optimum settings. Confirm certain settings, such a CPU and memory as well as hard drive type and size recognition.
- Ensure that you save your settings and restart the computer. The Bios password should be gone and the Bios set to its optimum settings.
- On some motherboards the jumpers cannot be moved and the battery cannot be removed or they do not work when you try to clear your password. There a three additional things you can do to clear a BIOS password.
- Physically remove the Bios/CMOS PROM chip from the motherboard and send it either to the motherboard manufacturer or a Bios developer for replacement of flashing.
- The motherboard may have a flash updateable Bios/CMOS PROM chip which means that you can download a fresh Bios update and re-flash the PROM to eliminate the password.
- There are programs (utilities) and cracks that can be used to try and identify the password or remove it from the PROM chip. Utilities to recover passwords are extremely expensive and are usually only sold to manufacturers and others involved in hardware and software development
Tips and Warning
- If the BIOS becomes corrupt, the computer is generally unusable to the point that it needs to go back to the maker.
- The following are some default BIOS password. You can try them first (for testing purposes)
- AMI_SW (case sensitive)