Joy-Con neutral position is off (no drift)
I replaced the left Joy-Con joystick and that seems to have fixed the drift. Now, however, the neutral position is off vertically (first photo). It doesn’t drift, it just sits there off-centre.
Unfortunately for some reason the Switch doesn’t register any inputs when calibrating (second photo).
How do I get calibration working again? Barring that, how do I get the Joy-con neutral to register correctly?