To clear bios password in acer 4720

These WEB sites may help resetting the BIOS password.
BIOS Password Reset and Recovery for Laptops & Notebooks http://repair4laptop.org/laptop_and_notebook_bios_password_reset.htmlFaulty LCD screen http://www.cgsecurity.org/wiki/CmosPwd http://techtips.salon.com/step-by-step-instructions-reset-dell-laptop-password-1667.html http://dogber1.blogspot.com.au/2009/05/table-of-reverse-engineered-bios.htm

Hi there,

Only way is to remove the CMOS battery for an hour or two and hook it back. It should work.
Optional is conatct Acer they would have a Default password for all the machines that they produce.

Post back if it is not working we will be happy to help you.
Hope this helps.
Cheers!!!!

when I have had this issue in the shop, we would open the bottom of the laptop , find the cmos battery (looks like a watch battery) and short out its terminals for a minute or so. this will reset the bios to defaults, and likely dump any passwords set in the bios. if this helps you leave some feedback. Cheers

The password to by-pass bios password are these, hope they will hope you, once you enter BIOS using these passwords you can reset it to normal
Phoenix Backdoor BIOS Passwords:

• BIOS
• CMOS
• phoenix
• PHOENIX

There is only one way to clear cmos (BIOS) passwords and I'll show you the procedure.....

Steps for Clearing BIOS Password Check

If users set BIOS Password ( Supervisor Password and/or User Password ) for a security reason, BIOS will
ask the password during systems POST or when systems enter to BIOS Setup menu. However, once it is
necessary to bypass the password check, users need to short the HW Gap to clear the password by the
following steps:

q Power Off a system, and remove HDD, AC and Battery from the machine.

q Open the back cover of the machine, and find out the HW Gap on M/B as picture.

q Use an electric conductivity tool to short the two points of the HW Gap.

q Plug in AC, keep the short condition on the HW Gap, and press Power Button to power on the
system till BIOS POST finish. Then remove the tool from the HW Gap.

q Restart system. Press F2 key to enter BIOS Setup menu.

q If there is no Password request, BIOS Password is cleared. Otherwise, please follow the steps and
try again.

NOTE: The steps are only for clearing BIOS Password ( Supervisor Password and User Password ).

Below is the picture showing the location of the jumper next to the memory module slots. This is the jumper connections that have to be "shorted".

Steps for Clearing BIOS Password Check

If users set BIOS Password ( Supervisor Password and/or User Password ) for a security reason, BIOS will
ask the password during systems POST or when systems enter to BIOS Setup menu. However, once it is
necessary to bypass the password check, users need to short the HW Gap to clear the password by the
following steps:

q Power Off a system, and remove HDD, AC and Battery from the machine.

q Open the back cover of the machine, and find out the HW Gap on M/B as picture.

q Use an electric conductivity tool to short the two points of the HW Gap.

q Plug in AC, keep the short condition on the HW Gap, and press Power Button to power on the
system till BIOS POST finish. Then remove the tool from the HW Gap.

q Restart system. Press F2 key to enter BIOS Setup menu.

q If there is no Password request, BIOS Password is cleared. Otherwise, please follow the steps and
try again.

NOTE: The steps are only for clearing BIOS Password ( Supervisor Password and User Password ).

Below is the picture of the Jumper location by the memory modules. These two points have to be "shorted".

You can ask for a bios pw reset from the computer manufacturer tech support dept.they can try to reset the pw for you,but if that does not work, the motherboard needs to be replaced on your system

you won't able to crack the password. you either have to flash the bios or reset it by opening up the laptop and using the "bios flashing jumper"

Bios passworrd is stored in cmos battery....If u can remove the cmos battery and insert it again...bios will not ask for password..its a small silver color battery in motherboard....

Bios password can usually reset by removing laptop battery and clock battery from motherboard, but HDD password as i know cant remove. You should change your HDD.