It now takes ages to restart (used to start in a few dreamy seconds).
After being shut down will only start up with long hold on power switch.
but no screen-touch or pen response (pen button clicks still open pre-chosen programmes as they should)
All of the keyboard/pad functions are working including zoom, scroll etc.
We reported in November that a firmware update in July this year appeared to have rendered some Surface Pro 4 touchscreens effectively inoperable and that it appears Microsoft could be convinced to replace affected devices if you are out of warranty.