Thinkpad T61 BIOS accessible but unchangeable.

[#1]

Question

I can access the BIOS setup but can't seem to make changes. I have made changes like Power On  Password and enabling the security chip but now I can't select any options. It's almost like it is in Lock mode. 

Answer

It sounds like you may have set a supervisor password on your system.

Unless the password is entered, BIOS changes and updates may be precluded.  There is no supported way to reset the supervisor password as this is a security feature and if the password is lost / forgotten, the system board will need to be replaced.