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Short pins on the bios chip. I have done this on T42's. I assume it will work on T30's as well. You'll have to search the internet for which pins to short (usually pins 5 & 6 or pins 7 & 8), but you short the pins together and turn the machine on. Be careful! Do it at your own risk. Once you are into the BIOS, you cancel the password settings and save.
if you've forgotten the BIOS password, you'll have to check with IBM. Often, they have a way, usually a temp password like method that you can use to disable the BIOS password. for desktop systems, removing and reconnecting the coin-cell battery or a password reset jumper can be used, try to check the manual of your laptop if that applies to you as well.
The BIOS password is configured from the BIOS setup and this password is stored on an EEPROM chip. There is no backdoor password available and IBM/Lenevo support says the motherboard needs to be replaced. Also removing the BIOS battery to discharge the BIOS and reset it to the default settings will not allow you to bypass this password. This also applies to the Power On Password and the Hard Disk Password. There is a way to crack the password but you need electronic skills, electronic components and several programs plus a working computer to carry out this task. For details on how to do this check this WEB site. http://sodoityourself.com/hacking-ibm-thinkpad-bios-password/
please you need to reset its bios. open the screws behind your laptop with keyboard icons to access your laptop cimos battery with care remove it for some time(3min), power on your laptop until it boots up. turn it off and put the battery back. the password will removed.