[amsat-bb] FT-736R 1.2GHz Issue?

I have a fully equipped FT-736R. The other module works in the radio. There is white noise (sounds like it is working) on 1.2GHz, but it does not receive or transmit on this band. Is there a common known issue with this module failing in such a way? Any tips would be appreciated.

Thanks, Chris KQ6UP