I'm having issues with the pantilt hat on a Pi3 with an official 2.5A power supply.
One of the servos (the pan one) doesn't work regardless of which channel it's plugged into, and whether I address it in software via '.pan' or directly via .servo_one/two. (using the 'smooth.py' test script'
It does jerk when the power is applied to the pi (the tilt servo does not) and it moves if I (carefully) move it manually.
The tilt servo works fine
Could it be a faulty unit?