Taranis Q-X7 not binding to receiver.

My new Taranis Q-X7 doesn&want to bind to my V8R7-II receiver. But my friends Taranis X9D has no problem. Both in D8 mode and using internal module. I think I have dodgy radio! :( UPDATE: Banggood came through and gave me a refund. Awesome! I also contacted FrSky and they directed me to update the internal module&firmware to a previous version which unfortunately didn&work. All my other receivers bind fine. It&just this one that doesn&I can live with that! ;)