You should have a bar graph below the helicopter symbol that lights up when the transmitter is on.It will light up to the green zone with good batteries.If your TX isn't lighting up you need to check the battery holder-make sure the batteries are in correctly and there are 8 of them-there is also a little plug that goes from battery holder to TX,sometimes these come unplugged.If all else checks out,look for a wire that may need to be resoldered.