yes check the gear switch is up or in position 0 if it is and you havent changed values in the gyro (in transmitter) when in heading hold mode the light might turn on then off leave the bird alone for about 5 seconds while everything initializes and then it should go solid red to say its in heading hold mode. if it does not then maybe flip the switch down and look at light. i dont have a b450 i do have a 400 but most gyros work about the same. i would recheck values in tx in gyro it should look something like 0  +65 or more and  1   49 or less . refer to manual for starting or recommended values. if it shows them values then maybe you have a bad wire somewhere or the gyro is junk. i wont even get into the stock electronics they slapped on the b400  they were nothing but junk.