Give use to Android phone with broken screen I have an BLÜ Pure XR with a broken screen (completely black) which I'm trying to put to some use (security camera perhaps), however, since I can't access the phone at all, I'm not able to turn on USB Debugging, and all strategies I've found online (including putting the phone in ClockWork mode, which I seem to have done successfully) using ADB yield "Permission denied" errors in one form or another (mount: Permission denied, adbd cannot run as root in production builds, ...java.lang.NullPointerException: Attempt to invoke interface method 'android.os.IBinder android.os.IServiceManager.getService(java.lang.String)' on a null object reference..., etc).

I say I've successfully put the phone in ClockWork mode because if I connect it to my PC via USB and I run adb devices shows me a device in the list, and some of the errors I get include "BLÜ Pure XR" in their contents so it seems to be somewhat successfully connected.

Am I attempting to do something impossible?
This will work only if the touch still works


Plug your phone to your pc
Unlock your phone
Perform the key combination which takes a screenshot 
Explore the files of your phone where your screenshots are located
See where you are at
Tap on the screen blindli trying to click on the icon you want to click
Rinse and repeat from step 3