Default [Q] Arc S open random stuff on screen

Hi

I replace a screen for one of my old phones, Sony Xperia Arc S. I followed the tutorial on youtube and everything went fine. Boot the phone, got to the unlock screen. All is well, but as soon as I unlock the phone, it will just go crazy. It will open random apps, like opening the dialer or calender or anything randomly. i can push the home button but it will just keep on opening stuff. I got where i did a factory reset on the phone. When I have to choose the language, all is fine. Got to the home screen and it went all crazy again. I am going to open the phone and reset all components again, but has anyone ever seen this sort of thing?

I will post a video of it if that is possible if you want to see.

thanks