On the 9C Super, the "T9C" will show up when you do not have a Campac installed, and you will have only 12 models. If you had a Campac installed, and have not removed it, then it's likely that the Campac has had some kind of failure, or there's been some kind of failure inside the transmitter's circuits that work with the Campac. We'd not know for sure, unless you have another Campac to work with. Install it and see if the transmitter detects it. If nothing changes, then there's a problem with the transmitter, and you may not be able to save any models in the first 12 slots if you send it in for repair. A repair and reset of the transmitter erases all stored model data.