Default [Q] Xperia Play Screen Issue

Hi

I am trying to get my old Xperia Play working again. I had no issues during the two years when it was my main phone, but I since have got the HTC One, and let the wife use the Xperia as her second phone. As far as i can tell, the rings on her fingers have damaged the screen. It does not respond to about 90% of commands, but there are some areas on the screen that still work. Typing is a nightmare, you have to turn the phone 90 and 180 degrees for certain letters to work, and some don't work at all...

I am pretty sure that a new screen would fix it, but somebody I work with said that even a new screen would not fix this issue as it's an old phone that relies on pressure on the screen to work.

Please can anyone advise what parts I would need to repair it. I am happy to do it myself, but don't know if it's a lost cause?

Any help would be much appreciated!