If I remember correctly there are 2 cables inside the toilet. They are much like the cables on the hand brake on a bicycle. Stepping on the pedal pulls the cables and gets things moving. One hooks to the blade , the other to the water valve thing. Each has a stop or "keeper" that tightens down on the cable. Sounds like one of them may have loosened and slipped. I had to remove the toilet and take it apart to access the cables. I purchased a rebuild kit from Camping World, it had new cables, keepers, and some other stuff . If you have to remove it and take it apart, may as well put in some new parts. Hope this helps.
John, the #1 man for the# 2 job!.
Region 3 , 1st VP
Go often to the house of a friend, for weeds choke the unused path........Emerson
Never pick a fight with an old man. If he is too old to fight he will just kill you........a wise old man.