How to reset bios password on sony vaio laptop?

SOURCE: I forgot BIOS password for SONY PCG-GRX520

The best way for the Sony is to remove the cmos battery for at least 30 minutes. Remove the main laptop battery and leave it out. Make sure the power adapter is not attached. The cmos battery can be reached after removing the keyboard and is attached to the motherboard vis a small cable. If you have a "jumper" that come equipped on hard drives to jump the pins on the back, you can "short" the pin connections on the cmos battery socket, power the laptop up using the ac adapter and letting the computer go through the bootup process. When this happens power the laptop back down, take the jumper off and replace the cmos battery. Power back on with just the ac adapter and boot the computer. If the laptop still askes for a bios password just hit enter and it should allow you to log in. Once in go into the bios and reset the date and time. Once that is done power down and replace the main battery. Reboot the laptop and let Windows load.

SOURCE: sony vaio VGN FJ290P password reset sony vaio VGN FJ290P

I have set the password for administrator when i entered the bios set up. you can change its setting but not the configuration unless you've entered the password. you can't change the password with a new one if you cant enter the old password. Next time dont forget your password because laptops has its security even when stolen you cant open its bios set up if its protected by password. CMOS battery is in the mother board. You need a service technician to open your laptop to reset the bios setup battery.

SOURCE: Sony Vaio FX-410 BIOS Password

If you are unsure of where to short out the battery contacts, just remove the battery and leave the battery out for 1/2+ hours or more, and the insert the battery again and the BIOS will be reset to the default settings.

Leaving the battery out has the same result as shorting shorting the contacts except you can insert the battery straight away instead of waiting 1/2+ hours for the same result.

CIROC TECH SUPPORT

• 524 Answers
• Posted on May 05, 2010

SOURCE: DIP SWITCH BIOS RESET POSITIONS SONY VAIO VGN-fs660

Hello,
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


This is a great troubleshooting step for those of you having POST issues or no POSTing at all. Like other troubleshooting steps, this will not always work but usually will depending on the problem.
Please let me know if you have any further questions or concerns.
Thanks.

SOURCE: Tecra , laptop bios password needs to be reset.

mera laptop
think pad r40e
bios pass word
my bhool gaya
pls mere ku help karo