The only thing I could do to test if the pen works was a bad scribble x.x Its so frustrating when everything finally works perfect and you want to do something and then its just say no. To be fair the tablet is over 6 years old and since I never opened it before, but my father helped me to open it, I could see how much dust is inside. Its not easy to open so I had never clean it inside. Maybe a reason why the tablet was so loud o.o I hope a new Battery helps and everything works then again. I was so proud that I could fix it with the secure boot and get it to work and now I am totally down and sad :/