I have a lt1050 hydro, mine would not move after shutting down the day before, the problem was the brake linkage at the transaxle, it was stuck forward. A little lube on the brake linkage and wiggle it back and forth to work it in, fixed mine.
I suggest having a helper move the pedals while you watch the parts that should be moving. on mine, the linkage has a spring that connects to the brake engagement lever(?), so it felt fine , the spring was pulling on the lever ,it just wasn't returning(releasing the brake pads). Along with this problem was a loud growling noise. Hope this helps some, John M