clean power on password

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http://askubuntu.com – i want to remove a power on password on laptop lenovo g550 using ubuntu version 10.04.1. i have remove the cmos batt for at least one hour and pack all up just thinking it will be erased automatically but in vain. i am thinking that it is stored in the eeprom but i cant remove it or be able to read the password. i tried to bypass the bios password but that too in vain.... do someone on earth have any solution for it pls??? (HowTos)