My settings screen goes black for a few seconds frequently, when I'm in the app management area of my device,an Asus z8s zpad. I could tell ya all the symptoms of this device but it'll b quicker to know how to determine if mitm is the issue. I have tried Eset, Sophos and several other a/v programs w no luck, performed at least ten factory reset/hard resets, the device has not registered any of the resets. Can you provide a layman's rendition of those steps for determining if that's the case?... Any help is appreciated.