Sounds like you need a manual:

http://www.futaba-rc.com/manuals/7c-manual.pdf
http://www.futaba-rc.com/manuals/7c-addendum.pdf

Happy reading and send in the radio for a check up. Better safe than sorry at a minimal cost.

You should be able to set ot back to "factory defaults" for each "model memory" and reprogram from there. At least then you will have a KNOWN starting point.