Is this a normal thing for these radios's? Ill start the car and the radio comes one but its like not receiving the signal. There is an orange square light that comes on when it doesnt work and has the letters Tr next to it. When the radio decides to come on this light goes out and wont come on when I push the button by it. Do you think its the antennae, or internal to the radio or where should I go to look for a problem, thanks. Its a tape deck radio also with no external equalizer.