Scan WhatsApp QR Code from device with broken screen to access WhatsApp Web i need to get a bunch of Whatsapp contacts off my phone, however i cant see anything on the screen. The phone still works.I tried to get it into debugging through usb mode but i cant see anything and is pretty much impossible. I need a way to either mirror the phone to pc without being able to interact with the device or retrieve all my whatsapp contacts via usb. Much appreciated.
There is an application through which you can control the screen over USB and adb called ADB control. Follow the link to install and use it. Then you backup contacts to your phone/google account once you have control.

Source: http://marian.schedenig.name/2014/07/03/remote-control-your-android-phone-through-adb/