Is your receiver and transmitter binded? It almost sound like it lost the bind.

I can understand the frustration on the TBLE02S. I run them on most of my newer Tamiya chassis but it was frustrating setting it up in the beginning.

The owner's manual is poorly written too. They should have block diagrams instead of all the words you have to read.

Once you confirmed that the receiver and transmitter has properly binded, redo the setup on the TBLE02S from the beginning by pressing the set button and turning on your power.