Do you have access to another transmitter? If so you can narrow it down to see if it is the transmitter or receiver. I would lean to the receiver but can't verify it without looking at it. One good thing is Redcat will replace the defective parts but it dosn't help you run today.
Mr. Bob
Countyline Hobbies
Grovertown, IN.
574-540-1123
[email protected]
www.countylinehobbies.com