If it is nonfunctional when it is inserted by itself then I don't think it is salvageable. There is no way to communicate with it if it is not coming online. Because of this you will be limited to what is available physically on the CMC. The only jumper setting I am aware of is the password clear. I don't think it will have any impact on the current situation, but it would be worth a try.
Insert a jumper into the password clear on the CMC. Then insert the CMC into the system. It will revert back to the default root/calvin user/pass. Aside from that you can try completely powering down the chassis and disconnect power. Then power on the chassis with just the 1 CMC loaded to see if it will initialize.
Those are the only suggestions I can think of to try to recover the CMC. Anything beyond that will require specialized hardware and an understanding of the CMC well beyond me.