Yesterday I investigated the issue of not responding coil of INPUT mirror.

I made some tests by swapping the coil driver channels and I concluded that the coil driver is working fine and the problem is inside the vacuum chamber.

The not responding coil is H1 (top coil). This unbalance in the pitch driving will excite length. This can be maybe counteracted with horizontal coils. 

We should consider if to open the chamber for further investigation/coil repairing.