i've got a Hornby tts class 40 chip, i put it in my Kernow Bulleid and as such have had to play around with cv settings. I got it to a good point of running but i suspect the start voltage was not right as the loco only started to move when i got to 7-8 (28 speed step). I changed cv2=10 and since then i've not been able to do anything with the chip, the loco does not move, i can't read from the chip or set a cv value, i also can't reset the chip by setting cv8=8.
Have i busted the chip?