This procedure can be used to resolve issues with lenovo pen (stylus) not working, as well as issues with charging.
- Turn off your laptop (not sleep, proper shut down)
- Turn laptop over
- With the hinge at the top, locate small hole on the left hand side, just above a screw.
- Take bent paperclip and insert into the hole. You will feel a small switch inside click
- Turn laptop back on and test