Sony K33 BIOS reset

I was able to reset the BIOS password by removing the keyboard and then removing the battery that is placed right below the keyboard.  I removed the battery, powered the unit on, turned the unit off and then put the battery back in.  Upon turning the unit back on I no longer was prompted to input a BIOS password.  I don’t know if this works on all K series notebooks but on the K33 it did work fine.