FWIW the i6B is one of FS' 1st gen RXs, it came out during and works just fine with the original FS-i6 TX.Then you need to be using the Flysky i6X transmitter. And when it binds the light should be solid red on the Rx.....as here............
There is one more thing you can try. Setting up for iBus with your receiver. This shows how to plug it up. But note you have to have a seperate power supply for the receiver........Great I love this "Plug N Play" equipment! Always seems to be the same thing! Thanks anyway. Maybe I will replace the FC and see if that will change anything.
Everything looks so simple. Unfortunately on the i6x it doesn't have a simple ppm pop up, maybe I'll try it in a while. Thanks again.