My Microsoft Lumia 950 running windows 10 mobile had a broken screen which had parts of the screen not functioning at all. No chance to enter my PIN code to unlock the screen. Even connecting it to my windows PC did not show the data as long as the screen is locked.
How-I-fixed-it:
You need two things to get access to your data again:
- A
touchscreen computer running Windows 8 / 10 (Mouse/Keyboard does not work)
- The "Project My Screen App for Windows Phone" from Microsoft which can be downloaded here:
https://www.microsoft.com/en-us/download/confirmation.aspx?id=42536
Install and start the app on your tablet. Connect your phone via USB to the computer and tap on the screen. The computer will show your mobile device screen. If your computer is a touchscreen you can interact with the phone screen on the desktop/tablet as you would do with your finger on the phone itself.
Enter your PIN code and... there you go.
I found some hints how to do it here:
https://answers.microsoft.com/en-us/mobiledevices/forum/mdwindows-mdtips/unlock-a-windows-phone-with-a-broken-screen/4fd97e0e-d83e-4d28-882b-a2b3120f3c0b
